To provide a spray gun for coating work, from which desired paint can be atomized/jetted even in such an environment that low-velocity and low-pressure air is used and in which pressure loss of air and a biased airflow are lowered extremely.

This spray gun 1 is provided with: a paint flow passage 139 having a paint inflow route 143 for making the paint P in a paint cup 5 flow in a gun body 9 and a paint conveying flow passage 145 for conveying the paint P flowing in the gun body 9 to the inside of the tip part 65 of a nozzle 7; and an air flow passage 141 having an air introducing flow passage 25 for introducing the air A which is supplied from the outside and has predetermined pressure and predetermined flow rate into the gun body 9 and an air conveying flow passage 147 for conveying the air A introduced into the gun body 9 to the outside of the tip part 65 of the nozzle 7. The air conveying flow passage 147 is made parallel to the paint conveying flow passage 145 and formed into a straight-line shape from the branching point from the air introducing flow passage 25 toward the tip part 65 of the nozzle 7.

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