An air circulation-type electric roaster according to at least one embodiment of the present invention includes: a body part; an air dispersing plate part including a bottom plate having at least onethrough-hole, and first and second side plates formed on the respective sides of the bottom plate, and each having a plurality of ventilation holes; a power supply unit including a first power supplyunit and a second power supply unit; a heating unit including a first power connection unit connected to the first power supply unit; an air circulation unit disposed adjacent to the inside of one side surface of the body part along the longitudinal direction of the body part and including a second power connection unit capable of being electrically connected to the second power supply unit; a body coupling unit mounted on one side in the direction perpendicular to the longitudinal direction of the body part and including a connection terminal connected to the second power connection unit andcapable of contacting the second power supply unit; and a cooking unit installed on the upper portion of the heating unit and heated by the heating unit. The power supply unit is configured to be detachable from the body coupling unit. In a state in which the power supply unit is mounted to the body coupling unit, a terminal included in the first power supply unit contacts a terminal included in the first power connection unit, such that the power supply unit and the heating unit are electrically connected, and a terminal included in the second power supply unit contacts the connection terminal, such that the power supply unit and the air circulation unit are electrically connected.