A wireless communication system includes a data transmitter, having an image pickup device, and a plurality of data receivers, for performing interactive wireless data communications between the data transmitter and each of the data receivers. The data transmitter includes a display for displaying an image of a data receiver photographed by the image pickup device, from among the plurality of data receivers, a data transmission destination recognizer, a directional antenna controller for directing a directional antenna to the data receiver recognized as a transmission destination of transmission data by the data transmission destination recognizer, a command transmitter for transmitting a communication designation command to the data receiver, and a device address storage for storing a device address of the data receiver. The data receiver includes a command receiver, and an ACK transmitter.