A slope (22) in which the main plate (34) is displaced between a low position and a high position, and a control section (100) for controlling the displacement of the slope (22). The control section (100) A first mounting detection means (110) for detecting a mounted state and a non-mounted state of the wheelchair (26) with respect to the ground side plate (34), a first mounting detection means (110) for detecting a mounting state and a non-mounting state of the wheelchair Third mounting detection means (130) for detecting a mounted state and a non-mounted state of the wheelchair (26) with respect to the vehicle body side plate body (36), a third mounting detection means (130) of the ground side plate And ground contact detection means (140) for detecting whether or not the end portion on the vehicle rear side is in contact with the ground contact surface (20).主板体(34)が低位置と高位置との間で変位するスロープ(22)と、スロープ(22)の変位を制御する制御部(100)とを備え、制御部(100)は、主板体(34)に対する車椅子(26)の搭載状態と非搭載状態とを検知する第1搭載検知手段(110)と、接地側板体(38)に対する車椅子(26)の搭載状態と非搭載状態とを検知する第2搭載検知手段(120)と、車体側板体(36)に対する車椅子(26)の搭載状態と非搭載状態とを検知する第3搭載検知手段(130)と、接地側板体(38)の車両後方側の端部が接地面(20)に対して接地しているか否かを検知する接地検知手段(140)とを有する。
