A sectional shape of a seat provided on a personal watercraft includes first to third seat portions, first to third hip support portions, and first and second rearward inclined portions. The first hip support portion extends rearward to a height higher than the second seat portion from the first seat portion. The second hip support portion extends rearward to a height higher than the third seat portion and higher than the first hip support portion from the second seat portion. The third hip support portion extends rearward to a height higher than the second hip support portion from the third seat portion. The second rearward inclined portion is inclined at an inclination angle larger than an inclination angle of the first rearward inclined portion with respect to a horizontal plane.