INTERNAL COMBUSTION ENGINE

An internal combustion engine-side mounting bracket (6) is connected to an internal combustion engine body (8) so as not to come into contact with a front cover (5) in a cylinder line direction of the internal combustion engine body (8). A bolt boss portion (32) of the internal combustion engine-side mounting bracket (6) penetrates a boss portion through hole (13) of the front cover (5) . A second bolt boss portion (32b) penetrates a boss portion through hole (13a) of the front cover (5) so that its outer peripheral surface does not come into contact with an inner peripheral surface of the boss portion through hole (13a). A fifth bolt boss portion (32e) penetrates a boss portion through hole (13b) of the front cover (5) so that its outer peripheral surface does not come into contact with an inner peripheral surface of the boss portion through hole (13b).