A composite electronic component includes: a composite body having a capacitor and an inductor coupled to each other, the capacitor including a ceramic body in which a plurality of dielectric layers and first and second internal electrodes disposed to oppose each other with each of the dielectric layers interposed therebetween are stacked, and the inductor including a magnetic body including a coil part; an input terminal disposed on a first side surface of the composite body; an output terminal including a first output terminal disposed on a second side surface of the composite body and a second output terminal disposed on the second side surface of the composite body; and a ground terminal disposed on the first side surface of the composite body.