Mário Costa Martins de Carvalho (born 25 September 1944, in Lisbon) is a Portuguese playwright and novelist.

He was involved in the resistance against António de Oliveira Salazar's dictatorship (a member of the Portuguese Communist Party), and had an adventurous youth.

During his military service he was jailed and tortured, and eventually escaped on foot to Sweden.

After the Carnation Revolution in 1974 he returned to Portugal and practiced law for many years.

[2] A God Strolling in the Cool of the Evening (Um Deus Passeando Pela Brisa da Tarde) won the 1996 Pegasus Prize for Literature and has been translated into English, French, Spanish, Italian, German, Greek and Bulgarian.