Edgar Vivar (born circa 1938) is a famous Mexican actor. He is best remembered as Señor Barriga from the El Chavo del Ocho show, and as Caquito from the El Chapulín Colorado show.

Vivar started his acting career in 1964 as a theater actor. He toured the United States with some of his plays. This gave him vast experience in the acting field. In 1970, Chespirito needed a robust person to play Señor Barriga as well as Ñoño in his upcoming Televisa production of El Chavo, and Vivar was hired for the job.

Both shows became major international hits, allowing Vivar to become known beyond Mexico and to tour all over the Latin Americas, Spain and, once again, the United States. He also made an attempt at becoming a telenovela actor, participating in his co-star Florinda Meza's production, Alguna vez Tendremos Alas (Sometime, we Might Have Wings).

His weight caused him serious heart related trouble after the Chespirito productions were over in 1978. However, he lost a great amount of weight, which helped save his life. He kept touring the countries where Chespiritos shows were kept on television as re-runs after the show was over.