Depth gauge for medical care

The present invention relates to a medical depth gauge. The medical depth gauge of the present invention measure the thickness of a bone of a human body, and comprises: a needle unit penetrating through the bone to measure the thickness of the bone; a display unit connected with the needle unit to fix a relative position with respect to the needle unit, and having scales displayed thereon to measure the thickness of the bone; a hanging unit connected with the needle unit to be rotated, penetrating through the bone along with the needle unit while rotation is limited, and hung on one surface of the bone by rotation after penetration; and a measuring unit coupled with the display unit to be relatively moved, and moved to a bone side while being hung on one surface of the bone to be closely placed on the other surface of the bone. A thickness between one surface and the other surface of the bone can be measured by using a movement distance of the measuring unit with respect to the display unit.