Pedro Guillermo Angel Guastavino (born 1 July 1954 in Gualeguaychú) is an Argentine Justicialist Party politician.

Between 2007 and 2019, he sat in the Argentine Senate representing Entre Ríos Province in the block of the majority Front for Victory.

[1][2] Guastavino qualified as a lawyer at the National University of La Plata.

From 1991 he worked as Director of the Institute of Financial Assistance at the Social Action Ministry.

[3] Guastavino was elected vice governor of Entre Ríos in 2003 as the running mate of Jorge Busti.