An integrated thermal management system for a vehicle may make refrigerant-related components compact by modularizing the refrigerant-related components. A refrigerant module of an integrated thermal management system for a vehicle according to an exemplary embodiment includes: a compressor having a first inlet port through which the refrigerant is introduced, and a first outlet port through which the compressed refrigerant is discharged; a condenser having a second inlet port through which the refrigerant discharged from the compressor is introduced, and a second outlet port through which the refrigerant, which has performed heat exchange, is discharged; an expansion valve having a third inlet port through which the refrigerant discharged from the condenser is introduced, and a third outlet port through which the expanded refrigerant is discharged; an evaporator having a fourth inlet port through which the refrigerant discharged from the expansion valve is introduced, and a fourth outlet port through which the refrigerant, which has performed heat exchange, is discharged; an accumulator having a fifth inlet port through which the refrigerant discharged from the evaporator is introduced, and fifth outlet port through which the refrigerant, which has separated into a liquid refrigerant and a gaseous refrigerant, is discharged; and a connection body configured to integrally connect the compressor, the condenser, the evaporator, and the accumulator and having a flow path through which the refrigerant discharged from the accumulator flows to the compressor.