A waterproof module includes a housing, an optical disc drive and a seal member. The housing has an outer surface, an opening and an inner surface defining a receiving space. The opening penetrates the outer surface and communicates with the receiving space. The optical disc drive includes a disc tray and a body disposed in the receiving space. The disc tray includes a tray body and a cover plate disposed at one end of the tray body. The tray body is slidable relative to the body between a retracted position and an ejected position. The seal member includes a connecting portion and a resilient portion. The connecting portion is stacked on the cover plate. The resilient portion surrounds the connecting portion. When the disc tray moves from the ejected position to the retracted position, the resilient portion presses against the outer surface and seals the opening.