Various embodiments introduce a device for attaching a protection film, the device comprising: a fixing tray including a seating portion on which an electronic device is stably placed; a base portion including a coupling portion to allow the fixing tray to be attached to or detached from the base portion and at least one rail formed along the longitudinal direction or the width direction of the coupling portion; a roller portion which moves along the at least one rail and presses a surface of the electronic device stably placed on the fixing tray; and a hardening portion coupled to the base portion, closing or opening the seating portion of the fixing tray, and emitting ultraviolet rays toward the fixing tray. Other embodiments are also possible.