The invention provides a housing apparatus which comprises a housing and a connecting structure, wherein the housing comprises an electric connection area, and the connecting structure comprises a cucurbit-shaped spring, a first spring clamping sheet and a second spring clamping sheet. The second spring clamping sheet is provided with a plurality of projection portions. The cucurbit-shaped spring is fixed on a PCB through the first spring clamping sheet, and the cucurbit-shaped spring is electrically connected with the housing through the projection portions of the second spring clamping sheet. The invention is further provided with the connecting structure and a terminal device. According to the housing apparatus, the connecting structure and the terminal device, wearing of the inner surface of the housing is effectively prevented.