Abstract: Provided is a wireless electrocardiogram monitoring device comprising: a patch part including a plurality of electrodes; and a module part detachably coupled to the patch part and capable of wireless communication with an external device, wherein the patch part comprises: a downward patch part formed at the bottom surface to be attached to the human body while some of the plurality of electrodes are exposed from the bottom surface; and an upward patch part disposed at the top surface opposite to the bottom surface while the others of the plurality of electrodes are exposed from the top surface.