| Rui Costa Pimenta | |
| Office: | National President of PCO |
| Term Start: | 7 December 1995 |
| Predecessor: | Created office |
| Birth Name: | Rui Costa Pimenta |
| Birth Date: | 25 June 1957 |
| Birth Place: | São Paulo, SP, Brazil |
Rui Costa Pimenta (born in São Paulo, 25 June 1957) is a Brazilian politician and a perennial presidential candidate aligned with the Trotskyist Workers' Cause Party (Portuguese: Partido da Causa Operária).
He was their candidate in the 2002, 2006, 2010 and 2014 presidential elections and placed last in all of the elections he ran.[1]