An opening structure of a portable apparatus includes a hook module and a camera module installed on a cover of the portable apparatus. The hook module includes at least one hook portion, at least one retaining portion and at least one resilient member. The camera module includes a casing, a camera lens and an axle, and a conversion component is connected to the axle. The hook portion is disposed on the retaining portion, and a resilience member is connected separately to the retaining portion and the cover, and the casing includes a camera lens and an axle installed on the casing. If the axle is rotated to produce a rotation force, the conversion component will convert the rotation force into a pushing force which will push the hook module to trigger a switch installed at the cover and turn on the portable hook module while the cover is being opened.