To provide a double tube cutting device capable of improving work efficiency without producing dust by forming the cut surface of a double tube orthogonally and precisely.

The double tube cutting device for cutting the double-wall tube 10 comprising an outer tube 12 and an inner tube 11 fitted with the outer tube 12 movably is provided with a receiving table 23 to receive the double tube 10, a fixing device 40 to press the tube 10 against the receiving table 23, and an electric saw 72 to cut the tube 10 by reciprocating a saw blade 71.