A cardiopulmonary resuscitation support device for assisting a rescuer with cardiopulmonary resuscitation using chest compressions, including: a pressure detecting device provided with a pressure sensor including a pressure sensing part which is configured to be overlapped on a chest, the pressure sensing part having a sheet form and being capable of flexural deformation in a flexible manner； and a displacement detecting device provided with a displacement sensor to detect a displacement of a hand of the rescuer compressing the chest, the displacement detecting device being configured to be retained by the hand of the rescuer at a part away from a chest compression surface.
