The present invention relates to a baseboard heater guard or security device designed to shield the upper and front surfaces of a baseboard heater. The guard or security device comprises two or more vertical members that substantially follow the contour of the outside surface of the baseboard heater forming a frame around the heater. The vertical members comprise or are attached to a fixing member designed for attachment on the wall above the baseboard heater and a second fixing member designed for attachment at a second point on the floor. One or more first horizontal members are attached to the two or more vertical members near the top surface of the baseboard heater. One or more second horizontal members are attached to the two or more vertical members near the front surface of the baseboard heater. Optionally, one or more third horizontal members are attached to at least one first horizontal member or to at least one vertical member, and optionally, one or more fourth horizontal members are attached to at least one second horizontal member or to at least one vertical member substantially creating a barrier on top of the top surface and in front of the front surface of the baseboard heater.