In a vehicle wherein a functional part arranged in a body cover is supported by a body frame and a lid which makes it possible to lock a closed state covering the functional part can be openably fitted to the body cover in a position matching the functional part. Thus, the risk of undesirable tampering with the unlocking member is to be minimized and the risk for the unlocking member to be influenced by external disturbance such as unfavorable weather is to be avoided as far as possible. A cover member in which a lid is arranged in a secluded position is openably disposed on a body cover, and an unlocking member for releasing the lid from the locked state is disposed on the body cover so as to be covered by a cover member in a closed state.