The FIAT 6605 is a Cold War era tactical truck of Italian origin. It was developed by FIAT in the 1960's to provide the Italian army with an artillery tractor.

The FIAT 6605 is a large and heavy 6x6 truck with large single tires. It has a forward control layout with the six men crew cabin mounted over the engine. A flatbed and winch are located at the rear. The FIAT 6605 is unarmed and unarmored. The artillery tractor is the standard model, but cargo and recovery versions have also been developed. These feature a shorter cab that seats two people.

The artillery tractor model is able to tow a large howitzer such as the FH-70, its associated crew and up to 5 t of cargo. The cargo version allows up to 8.5 t of cargo and comes in a variety of versions, including several types of tankers. The recovery variant is fitted with a heavy winch system.

The 6x6 chassis and large tires provide a good off road mobility, albeit at limited speeds. For todays standards the power to weight ratio is limited. The 260 hp diesel engine allows for a maximum road speed of 80 km/h.

The FIAT 6605 was adopted by the Italian military. It was also exported to the Middle East and Africa. It remains in Italian service but given the conflicts in Iraq, Somalia and Libya foreign use is highly limited nowadays.