According to one embodiment, a semiconductor memory device includes a memory cell; a reference signal generation circuit; a sense amplifier; a first transistor configured to electrically couple the memory cell and a first input terminal of the sense amplifier; a second transistor configured to electrically couple the reference signal generation circuit and a second input terminal of the sense amplifier; a first control circuit configured to supply a voltage to gates of the first transistor and the second transistor; a second control circuit configured to supply a first voltage except 0V to a back gate of the first transistor; and a third control circuit configured to supply a second voltage except 0V to a back gate of the second transistor.