| Alexandru Matei | |
| Full Name: | Alexandru Barabas Matei Guiman |
| Nationality: | Romanian |
| Birth Date: | 31 December 1980 |
| Birth Place: | Bucharest, Romania |
| Height: | 195 cm |
| Weight: | 95 kg |
| Currentnumber: | 7 |
| Nationalyears1: | 2011-2014 |
| Nationalteam1: |  Romania |
Alexandru Barabas Matei Guiman (born 1980) is a Romanian water polo player. At the 2012 Summer Olympics, he competed for the Romania men's national water polo team in the men's event. He is 6 ft 3 inches tall.