Abstract: An input buffer of memory device for reducing current consumption in standby mode comprising a bus input buffer for inputting successive bus data signals through a bus and buffering the inputted bus data signals, and a flag buffer for generating a control signal in response to a system clock signal and a flag signal indicative of a bus data input time point to operate the bus input buffer before a first one of the bus data signals arrives at the bus input buffer and to allow the bus input buffer to enter a standby mode at once after the bus data signal input is completed, the flag signal being enabled before the first bus data signal is inputted and disabled before the bus data signal input is completed. According to the present invention, signal increase can be suppressed and power consumption can be reduced.