A cargo bed for a utility vehicle includes a bed portion including a left-side wall portion and a right-side wall portion and a rear opening between rear ends of the side wall portions, and a tail gate to close the rear opening of the bed portion. The side wall portions include a pair of first left and right groove portions extending along an up-down direction at a rear end of the side wall portions. The left-side and right-side wall portions further include a pair of second left and right groove portions disposed forward with respect to the pair of first groove portions and extending along the up-down direction at the left-side and right-side wall portions. The pairs of first and second groove portions are arranged such that a left end and a right end of the tail gate are each slidable in the up-down direction and the tail gate is held removably.