MEDICAL DEVICE

A medical device capable of safely cutting a lesion area with relatively high accuracy while supplying a liquid into a body and discharging a cut object. The medical device that removes an object in a body lumen includes: a rotatable drive shaft; a cutting portion fixed to a distal portion of the drive shaft and configured to cut the object; an outer tubular shaft configured to rotatably accommodate the drive shaft; and a handle, in which the outer tubular shaft includes a tubular inner layer and a tubular outer layer fixed to the inner layer and surrounding the inner layer, a first lumen is formed between the outer layer and the inner layer, a second lumen is formed between the inner layer and the drive shaft, and the outer tubular shaft is rotatable with respect to the handle.