Goggles include a frame (1), a lens (2) and a pair of left and right belt arms (3, 3). On the frame (1) a stop hole (5) is provided each left and right of a middle of at least one of an upper frame (1a) and a lower frame (1b) of the frame (1). The lens (2) has an upper side and a lower side, at least one of which has a stop hole (11) at a position corresponding to each stop hole (5) in the frame (1). Each of the pair of left and right belt arms (3, 3) has bifurcated portions (3a, 3a), at least one of which has a lock mechanism (17) on the end. The frame (1) and the lens (2) are placed on each other and the respective corresponding stop holes (5, 11) are aligned. By the mechanisms (17) of the belt arms (3, 3), the stop holes (5, 11) are brought into either a lock state to secure the frame (1), the lens (2) and the pair of left and right belt arms (3, 3), or an unlock state where the lock state is released to separate them(1, 2, 3, 3,).
