Disclosed is an automotive rear vehicle body structure which comprises a rear subframe (21) provided with right and left side member segments (22). Each of the right and left side member segments (22) has a rear region provided with a rear fixing section (26) attached to a respective one of right and left rear side frames (7), and a front region provided with a front fixing section (25) attached to a vehicle-body cross member (10). A position of the front fixing section (25) of each of the side member segments (22) is set to be located inward of the respective one of the rear side frames (7) in a vehicle width direction, and each of the side member segments (22) is provided with an arm support section (28) configured to pivotally support a suspension arm (32), at a position rearward of the front fixing section (25).