A medical image recording apparatus includes: a storage unit that records, at a first compression rate, moving image data acquired by a modality apparatus； a control section that determines degrees of importance of individual frame images constituting the moving image data； and a compression processing section that, if a situation of the moving image data recorded in the storage unit satisfies a prescribed condition, (i) compresses the moving image data at a second compression rate that is smaller than the first compression rate and (ii) compresses each frame image of the moving image data at a compression rate that is smaller than the first compression rate and larger than the second compression rate and that decreases as the degree of importance decreases.
