The official name of Saransk opera theatre is Yaushev`s  State Music Theatre. The repertoir of this theatre has opera performances and ballets, as well as musicals and children spectacles. Concerts are also held there.

The music theatre of Saransk was founded in 1935. Illarion Yaushev born in Lobasky village had been the leading singer of the music theatre since 1937. Yaushev graduated from the Moscow conservatory and then worked at the Moscow and Mordovian philharmonic for many decades. Later the Saransk opera theatre was named after him.

In 2001 it was moved into a new beautiful building with a spacious house and a big stage. It is opposite the glass building of the Mordovia State University near the Millennium Square.