Valeriu Cosarciuc (born 24 November 1955) is a Moldovan politician, who served as Deputy Prime Minister in the Dumitru Braghiș Cabinet (between 21 December 1999 and 19 April 2001), coordinating the government's activities in the field of industry, energy, agriculture, communications and the environment.

He studied in 1972–1977 at the Polytechnic Institute of Chișinău (now Technical University of Moldova), obtaining a diploma of engineer specialized in machine building technology, lathes and tools.

From 1980 he was transferred to the position of head of the technological group at "Moldselmaș" in the city of Bălți, being advanced in 1986 as the main technologist.

Between 1989-1995 he served as head of the "Agroteh" factory of "Moldselmaș" and since 1995 he has been elected chairman of the Board of Directors of "Moldagrotehnica", whose task is to ensure effective economic and financial activity and enterprise development.

Between 23 April 2001 – 25 August 2005 and 23 January 2006 he was the representative of the Republic of Moldova at the Parliamentary Assembly of the Council of Europe.