A coil module includes a first coil set and a second coil set. The first coil set has an isolation frame. The second coil set has an open first winding body. The first winding body has two ends which are out of contact with each other. One of the two ends has a first conductive portion projecting from the first winding body. The other one of the two ends has a connecting end from which an open second winding body is integratedly outward extended. A terminal of the second winding body has a second conductive portion which is outward protrudent. The connecting end comprises a bent portion which makes the second winding body and the first winding body arranged in the same direction so that the second winding body and the first winding body are attached on two opposite sides of the isolation frame.