Nikola Blažičko (born 13 September 1977) is a former Croatian handball goalkeeper and co-trainer at Nettelstedt-Lübbecke.

[2] Blažičko began his career in his hometown club Zamet in Rijeka.

The same year he played for the national team in World Championship in Tunis and Mediterranean Games in Almería where Croatia finished second.

He also played at the 2006 European Championship in Switzerland where Croatia finished fourth losing the third-place match to Denmark 32:27.

[4] Unfortunately in June the same year Blažičko got injured losing his spot in the national team and being replaced with Venio Losert.