A saddle type vehicle includes: a seating seat on which a passenger is allowed to be seated; a seat rail to which the seating seat is allowed to be attachably and detachably attached; a frame cover covering outer sides of the seat rail; a helmet holder provided on the seat rail; and a restriction part provided in the vicinity of the helmet holder on the seat rail and projecting toward an inner peripheral surface of the frame cover, in which the helmet holder includes: a hooking portion on which a hook ring of a helmet is allowed to be hooked; and a guide portion extending from the hooking portion, and the restriction part is provided in the middle, of the guide portion, in a longitudinal direction.