VEHICLE LID DEVICE

This vehicle lid device includes: a box attached to a vehicle-body side surface portion, and including a storage space storing a vehicle-energy supply port, a communication hole for the storage space and a vehicle-body deep side to communicate with each other, and an opening for exposing the supply port to a vehicle-body outside; a lid to open/close between opening-closed/opened positions; and an open/close mechanism interposed between the box and the lid, for opening/closing the lid relative to the box about an axis line on an upper-periphery side of the opening. The open/close mechanism includes a plate-shaped hinge arm extending in a direction including an axial direction of the axis line, and covering a box-lid gap formed above the opening in a lid-opened state. Both axial-direction ends of the hinge arm are respectively located on axial-direction outer sides relative to axial-direction periphery ends of the supply port or the communication hole.