Disclosed is a vibration source attachment structure equipped with a vibration isolation device. In the vibration source attachment structure, the vibration source (41) of an engine, or the like, is attached via the vibration isolation device (50) to a subframe (30) that has been attached in a downward position with respect to a vehicle body frame (20). The vibration isolation device (50) is provided with a first attachment (51) that attaches to the vibration source (41), a second attachment (52) that attaches to the subframe (30), and an elastic body (53) that connects the first and second attachments (51, 52). The subframe (30) is provided with fitting holes (31) that are formed in the vertical direction of said subframe. The second attachment (52) is detachably attached to the fitting holes (31) by means of press fitting.