An automatic electronic component mounting device (1) for mounting electronic components onto a printed wiring board (10), comprising a component mounting head (4) moving along the X-axis direction and sucking an electronic component to mount it on the printed wiring board (10), a table (8) for moving the printed wiring board along the Y-axis direction, electronic component supply devices (12, 14) attached to this table (8) and moving concurrently with the printed wiring board, and a component image recognizing/correcting means (16) for image-recognizing the attitude of an electronic component during a period from the sucking of an electronic component by the component mounting head to the mounting and correcting the attitude, the device being so constructed as to allow the sucking position and mounting position of an electronic component and the image recognition position of an electronic component to be located on the X-axis. Also, electronic component supply devices of square-pipe type and plate type are disclosed.
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