A goal of the present invention is to provide a lid lock structure for a saddle type vehicle which can achieve reduction in weight of a vehicle body cover while a lock member is attached to a vehicle body cover side. To that end, the invention proposes a lid lock structure for a saddle type vehicle including a lock member (112) capable of locking a lid (101) in a closed state fixed to an upper inner cover (53) and placed on upper frames (15, 15) below the upper inner cover (53).