[Object] To provide a card socket having a structure that achieves a low profile.[Solving Means] The base portion of a card frame is basically constituted by a base frame (100) made of metal. Resin is used only for parts where absolutely necessary, such as a housing (200) for retaining contacts (300) and a switch piece holding housing (700) that retains a second switch piece (620). Thus, the resin thickness can be reduced while maintaining the strength of the card socket, so that the structure of the card socket is simplified and a low profile can be achieved.