Abstract: An insulating unit for a driving motor which insulates between at least three coils inserted into slots of a stator and between the coils and a stator core may include a first main insulating surface configured to correspond to one inside surface of a slot in a length direction of the slot. A second main insulating surface is connected to one end of the first main insulating surface, encloses two coils among the at least three coils, and corresponds to a portion of another inside of the slot. A third main insulating surface is connected to the other end of the first main insulating surface, encloses at least one of remaining coils, and corresponds to the remaining portion of the other inside of the slot. A first sub insulating surface is connected to the second main insulating surface, encloses one of the two coils.