A danseur or a dancer.
*Because you said "Ballerina" that means the top ballet dancer in a company. There can only be one Ballerina in a company. The male counterpart would be called a Danseur Nobel. Other male dancers would be called Danseurs, or by their rank such as Principal, Soloist or Corps de ballet or just ballet dancer. The same goes for the other women in the company. They would be just called ballet dancers or by their rank. Never a Ballerina.