An outboard motor having an outboard motor body generating a thrust by rotating a propeller that is driven by an engine mounted to the outboard motor and an attachment device for attaching the outboard motor body to a hull. The outboard motor includes a mount device having an upper mount and a lower mount arranged between the outboard motor body and the attachment device for attaching the outboard motor body to the hull and supports an upper portion and a lower portion of the outboard motor body, respectively. The mount device also includes an anti-vibration unit and a displacement restriction unit. The lateral displacement restricting mount section and a member opposing the lateral displacement restricting mount section abut against each other with the abutment surfaces inclined with respect to a longitudinal direction of the outboard motor body.