A memory card connector for a first memory card or a second memory card has an insulative housing, a terminal set and a shell. The insulative housing has a first space for the first memory card and a second space for the second memory card. The terminal set is mounted in the insulative housing and has plural terminals and at least two auxiliary terminals. Each auxiliary terminal has an engagement portion preventing a short circuit due to a wrong contact of the auxiliary terminal and the second memory. The memory card connector has only one terminal set, therefore is compact and has a low cost.