We study a nonlocal diffusion problem with absorption term and Neumann boundary conditions. We prove the existence and uniqueness of solutions, and give a comparison principle for them. The quenching phenomena of solutions is analyzed for some absorption term. Keywords: Non local diffusion, Neumann, absorption, quenching. To cite this article: M. Bogoya, C.P. Mora, Analisis de extincion de una ecuacion de difusion no local con termino de absorcion, Rev. Integr. Temas Mat. 32 (2014), no. 2, 129-139.