Pedro Opaso Letelier (July 20, 1876 – April 9, 1957) was a Chilean politician and provisional vice president of Chile in 1931.

He completed his studies in his native city, and then attended the Universidad de Chile, where he became a physician.

In 1920 Opaso was named minister in several occasions as a representative of the Democratic Liberal Party.

At the time of the collapse of the first administration of Carlos Ibáñez del Campo in 1931, he was the President of the Senate.

The speed he demonstrated to get rid of the power earned him the nickname of The Relayer (Spanish: El Pasador), that accompanied him till his death.