A card edge connector includes: a housing including a board accommodation space and a connection terminal including a resilient contact piece configured to contact a circuit board inserted into the board accommodation space, the connection terminal being mounted into the housing. The connection terminal is movable between a connection position where the resilient contact piece is in contact with a surface of the circuit board and a retraction position where the resilient contact piece is separated from the circuit board. A first interference preventing portion and a second interference preventing portion are formed between a moving path of the resilient contact piece and the board accommodation space. The first interference preventing portion and the second interference preventing portion restrict the interference of the resilient contact piece and an inserting end part of the circuit board inserted into the board accommodation space in a moving process of the connection terminal.