PURPOSE: To secure an engine which can be used conveniently as a small power supply for houshold use and can be manufactured and assembled simply at a low cost by manufacturing an axial flow gas turbine, and a generator of combustion gas used therefor separately, and connecting them together before using them.

CONSTITUTION: A turbine engine is composed of an axial flow gas turbine A, and a generator B for generating a gas used as actuation gas for this turbine. In the axial flow gas turbine A, a turbine shaft 4 provided with a vane 5 on the circular face is rotatably supported inside a casing 1 whose one end acts as an injection port 2 of combustion gas, and other end acts as a discharge port 3. Meanwhile, in the generator B for generating a gas used as actuation gas, a compression chamber 18 is formed by sealing the tip end part of a cylinder 17 provided with a piston 16 which reciprocates by a crank mechanism 15, and a rotationally moving valve 19 which has an air port 20 is provided by being incribed on the inside of the compression chamber 18. An intake port communicated to a fuel carburetor and an injection port communicated to the turbine A are formed in the compression chamber 18.