There is provided a biocompatible member comprising: a base material； and a film provided on the base material, wherein the biocompatible member includes: 1) a compound having a phosphorylcholine group, and 2) a polymer of a polymerizable compound, or an oligomer or polymer compound, provided that 2) the polymer of a polymerizable compound, or the oligomer or polymer compound does not have a phosphorylcholine group, the film is a composition gradient film in which the composition of 1) and 2) continuously varies in such a manner that the proportion of 1) increases and the proportion of 2) decreases from the side closest to the base material to the side farthest from the base material along a film thickness direction.
