A memory device and an operating method thereof are provided. The memory device includes: a memory cell array including a plurality of memory cells respectively arranged at points at which a plurality of word lines and a plurality of bit lines cross; and a control logic circuit configured to precharge a select word line connected to a selected memory cell and precharge a select bit line connected to the selected memory cell in a read operation, wherein the control logic circuit is further configured to precharge a first unselect word line among unselect word lines to a second voltage when the select word line is precharged to a first voltage, a level of the first voltage is lower than a level of a third voltage applied to an unselect bit line when the select word line is precharged to the first voltage, and a level of the second voltage is higher than the level of the third voltage.