A connector device comprises a tray, a connector body, a lock member and a pressing member. The lock member is unmovable beyond a second position along an ejection direction. The pressing member applies a force toward the second position directly or indirectly to the lock member. The tray is formed with a locked portion. The lock member is provided with a lock portion and a pressed portion. The lock portion locks the locked portion to prevent the tray from moving beyond a lock position along the ejection direction when the tray is accommodated in the connector body. The pressing member presses the pressed portion against the case when the connector device is attached in the case. The tray located at the locked position is positioned relatively to the case by this pressing.