René Marie Joseph Perros  MEP (12 March 1870 – 27 November 1952) was a French Roman Catholic missionary and bishop who served as Vicar Apostolic of Eastern Siam from 1909 to 1947.

In 1896, he served as professor in the Bangxang Seminary, and was also attached to the College of the Sacred Heart of Jesus, Bannokheuk.

He subsequently served as vicar at the church of Muang Phanatsenikom in Monthon Patchim, and in Maha Rat District.

He was gazetted Captain, sent to Belfort, and permitted to act as military chaplain and to wear the episcopal cassock and cross.

In 1915, he was released from further military service by the French government, and he returned to the Siam Mission where he arrived on 16 October 1915.