PROBLEM TO BE SOLVED: To provide a pushing-in device capable of securely sending a disposed object inside a casing into a space for disposing with a small force. SOLUTION: This device comprises the casing 5 having a bottom surface part 2 tilted forward and downward by a predetermined angle θ, a pushing-in plate 3 tilted rearward and upward for the bottom surface part 2 for forward pushing the disposed object D inside the casing 5 and a drive mechanism 4 for forward and backward moving the pushing-in plate 3. A lower end edge part 3b of the pushing-in plate 3 can forward oscillate with an upper end edge part 3a as the center and abuts on the bottom surface part 2 for being prevented from backward oscillating. COPYRIGHT: (C)2003,JPO