An air circulation-type electric roaster according to some embodiments of the present invention includes a body,an air dispersing plate unit configured to be mounted on the body and including a bottom plate having at least one through hole and a first side plate and a second side plate formed respectively on both sides of the bottom plate and each having a plurality of ventholes, a power supply unit including a first power supply unit and a second power supply unit, a heating unit including a first power connecting unit configured to be connected to the first power supply unit, a first air circulation unit arranged close to an inner side of a first long side of the body along its longitudinal direction and including a second power connecting unit configured to be connected to the second power supply unit, a body connecting unit configured to be mounted on a first short side of the body in a direction perpendicular to the longitudinal direction and including a first connecting terminal configured to be connected to the second power connecting unit and contactable with the second power supply unit, and a cooking unit mounted above the heating unit and including a cooking surface configured to be heated by the heating unit. The power supply unit is configured to be connected to the body connecting unit in a detachable manner, and in a state in which the power supply unit is connected to the body connecting unit, a terminal included in the first power supply unit and a terminal included in the first power connecting unit are brought into contact with each other to electrically connect the power supply unit and the heating unit, and a terminal included in the second power supply unit and the first connecting terminal are brought into contact with each other to electrically connect the power supply unit and the first air circulation unit.