Born in Split 8.11.1983. as the oldest child in the sport family (mom Venera was a cross-country athlete,  a basketball player and a gymnast, and father Joško was athlete, decathlon athlete, the current record holder of Croatia). She was named after the Moroccan city Casablanci where her father in 1983. won gold medal at the Mediterranean games.

She has three brothers, the oldest is Marin, former basketball player, while the youngest Nikola is exceptional football talent.

Blanka’s sport talent was there early. She began to train athletics with 7 years, with her father who worked as a coach in athletic club. Her merrits were the speed and excellent coordination. She trained sprinter disciplines, groin, jump further and height, throw basics. Her above average body height and slenderness prevailed in the decision her specialty will be high jump.

1997. Bojan Marinovic becomes a member of staff expert in charge of technic and to this day is important link of Blanka’s development. Father Joško determines all parameters of the training process, and arranges sport and social actions of his daughter. All her training through the elementary school, which she finished with great success, he brought down to thorough work that matched her biological age, with no aspirations to create a noticeable result too quickly.

The first significant result Blanka achieved in year 1999, when, on the World Championship for juniors in Poland when she achieved 8th place, and that year she shared a second position with another 3 girls on the world list of younger juniors, till the age of 17. Next, Olympic year, was magic, and Blanka will especially remember it for the entire life. Remarkable series of improvements of her personal records from the results of 180 cm to worldly 193 cm  and A standards for the Olympic Games in Sydney, rarely was recorded in the world's atheltic history.

With 192 cm jumped at the Olympics, as the youngest competitor (16 years), she finished on 17th place.
A month after she became world junior champion in Chile with 191 cm jumped.

2001. at the World Championships in Edmonton she achieves extraordinary 6th place with 194 cm jumped, and she was on the 5th place on the Games of the good will that were held in Melbourne, and she won a gold medal at the Mediterranean Games in Tunisia. In May of 2002. she finished her high school with excellent success, and she was freed from matriculation and got position as a farmaceutical technician. On the Senior European Championships in Munich in 2002. she wins 5th place. That same year, she defends the title of the best junior in the World Junior Championships in Kingston with 196 cm jumped.

She decides that the following two years she will professionally consecrate to sport. This decision makes it better for her training process and, in the indoor season of 2003., she has already improved her personal record by jumping 198 cm and for 4 cm she improved Croatian record. At the indoor World Championships in Birmingham she finished on the 4th place. Outdoor season began with series of great results, she won in Paris in the Golden League competition with a 199 cm, and in Zagreb on 7th of July on Hanžeković memorial she jumped 2 m. In the Polish city Bydgoszcz she became European champion to 23 years with the result of 198 cm, and in Zurich on the Golden League meeting she jumps 201 cm and takes second place in this "holy" competition.
She reaches the end of season on the 4th positions in the IAAF ranking in the world's best female high jump athletes.

The olympic year 2004 begins great. She wins bronze medal at the World indoor Championships in Budapest. In the summer part of the season she was very good, and in the beginning of August in Ljubljana she jumped 203 cm announcing good opportunities for the Olympic Games in Athens..

Unfortunately from Ljubljana wagons started to go downhill. Blanka got "virosis", and her form fell. In Athens she managed to enter the finals, but in the finals she had strenght only for one the jump. Postpay was found that she is suffering from hipertireosis. Nothing the same as before. She was tired from each effort, she had no patience to be anywhere for a long time, and her sports career came into question. She tried the conservative methods of treatment to bring her skills to acceptable level, but without success. Eventually the operation was the only chance that she could continue her career.
In the third month of 2005, in Zagreb, she had an operation of thyroid.

Long recovery was painstaking, but effective. In July the same year she managed to jump 195 cm. That day was her new birthday.

A year 2006 was wondrous. She flew 13 times over 2 m. She reached 205 cm in the hall and 203 in the open. She tooked the second place at the World indoor Championships in Moscow. Unfortunately, neither of her 201 cm, in the first attempt, were not enough for a medal at the European Championships in Sweden.

She began a year 2007 with a beautiful result at a number of meetings. Especially  emotionally performance was in late February at the meeting in Gripe, Split, where around 5000 spectators emotionally accompanied her every jump.

Problems with sprinter shoes and slidding during competition at the European Championships in Birmingham resulted with the 5th place with a modest 192 cm. Competition for oblivion. Summer season began furious; victory by jumping 204 cm, and the attack on the world record. How it started, same it was closed. In nineteen performances, eighteen was victory. Total of 20 times over two meters.

The crow of the season and previous career was a gold medal at the World Championship in Osaka with 205 cm. She is the first on the top list of achievements with a jump of 207 cm in Stockholm, which is also the second best score of all time. She is the winner of the Grand Prix finals in Stuttgart, and the European athletic federation declared her the female athlete of the year. And from the IAAF's arrived prestigious award. Her jump of 207 cm has been declared "an accomplishment of the year".

Olympic year 2008, all 24 competitions, Blanka finished with a result above 2 m, and jumped over that altitude 41 times. She won 22 times and was second twice. Gold medal at the World indoor Championships in Valencia, Silver Medal at the Olympics in Beijing, and five victories in the Golden League competitions and victory at the World athletic finals in Stuttgart marked the magic year, where she increased the average results at 202.9 cm. In the first competition in 2009, 26.01. in Rijeka, Blanka rounded the impressive and round number of 100 jumps over 2m in 63 contests.

All time jumps and competitions over 2 m: