A chassis includes a cage. The cage includes a body, a clamping member, and a buckling member. The body includes a first sliding portion, a fastening portion, and an accommodating area. The accommodating area includes a guide rail portion. The guide rail portion and the first sliding portion are disposed on two sides of the accommodating area, respectively. The fastening portion is disposed on one side of the accommodating area away from the guide rail portion. The clamping member is slidably disposed on the first sliding portion. The buckling member is disposed on the clamping member. The buckling member is adapted to be in contact with the fastening portion.