OPERATION INPUT DETECTION DEVICE AND CONTROL DEVICE FOR VEHICULAR OPENING-CLOSING BODY

An operation input detection device (20) includes: a side-surface proximity sensor (6) that is provided at a lower side surface portion (4a) of a vehicle (1); and an operation input detection portion (10, 50) that is configured to detect an operation input based on a sensor output of the side-surface proximity sensor, wherein the operation input detection portion is configured to determine that the operation input is performed in a case where when a change in the sensor output indicating proximity of a detection object is detected, after a first peak (Pa1) is detected in an acceleration of the sensor output, a second peak (Pa2) is detected in the same direction as that of the first peak at a first predetermined interval (T1) that is set in advance.