A heat pump system for a vehicle regulates a temperature of a battery module by use of one chiller in which a coolant and a refrigerant exchange heat, and recovers various heat sources in a heating mode of the vehicle and utilizes the recovered heat sources for indoor heating to improve heating efficiency, and may include a first valve that controls a flow of a coolant introduced into an internal, an electrical component cooling device, a battery cooling device, an indoor heating device, an indoor cooling device, a centralized energy device, and a chiller, in which the first valve may include at least one port through which the coolant is introduced or discharged.