The purpose of the present invention is to provide a medical material capable of suppressing adhesion of platelets and proteins even when in contact with biological components such as blood for an extended period of time. The present invention provides a medical material that is a copolymer comprising hydrophobic units and hydrophilic units in which the hydrophobic units have a C2-20 terminal alkyl group in a side chain, the static contact angle of water in the copolymer is at least 30° and less than 70°, and the glass transition temperature of the copolymer exists at only one point in the range from 45°C to less than 90°C.
