The disclosure relates to a medical material including a copolymer having a repeating unit (A) represented by the following formula (1):wherein R11 is a hydrogen atom or a methyl group, Z is an oxygen atom or —NH—, R12 is a C1-6 alkylene group, R13 and R14 are each independently a C1-4 alkyl group, and R15 is a C1-6 alkylene group, and a repeating unit (B) represented by the following formula (2):wherein R21 is a hydrogen atom or a methyl group, R22 is a C1-6 alkylene group, and R23 is a C1-4 alkyl group. The repeating unit (A) is contained in a proportion of 0.6 to 7 mol % based on all the structural units of the copolymer. The disclosure makes it possible to provide a medical material and a medical device, which exhibit excellent antithrombogenicity even when used under severe conditions prone to thrombus formation.
