Provided is a hair transplanter having high precision in hair transplantation which may finely adjust the length of a hair transplantation needle unit, into which a hair root is inserted, according to thicknesses of skin tissue layers within the scalps of individuals during hair transplantation. The hair transplanter includes a central rod including a guide hole, a hair transplantation needle unit inserted into the guide hole of the central rod, a central case body including a conical cover and a waist part having a small diameter, formed at the front end thereof, and a fixing cover and a tuning cover, formed at the rear end thereof, a core shaft configured to push a hair to be transplanted, which is inserted into the hair transplantation needle unit, and a pressing button including an adjustment lever to fix the core shaft and a lock nut to fix the adjustment lever.
