A rear frame (2) of a saddle-riding vehicle supports a rider seat (22) and a passenger seat (24). A tail lamp (26) is supported by rear end portions (66L, 66R) of the rear frame (2). The rear end portions (66L, 66R) of the rear frame (2) are open rearwardly. The tail lamp (26) is disposed in the open region and closes the region between the rear end portions (66L, 66R) of the rear frame (2).