To solve the disadvantages that cleaning power is not sufficient, a nozzle does not smoothly advance in a bent part of a pipe line and structure is complicated to increase the production cost in a conventional pipe line cleaning device.

A 1st nozzle 10 is provided at the tip part of a 1st flexible hose 20, the rear end part of the 1st flexible hose 20 is connected in series to a 2nd nozzle 30 provided at the tip end part of a flexible 2nd flexible hose 40, a 1st stress nozzle hole 12 for jetting high pressure jet water W in the diameter direction is formed in the 1st nozzle 10, a 2nd stress nozzle hole 32 for jetting the high pressure jet water W in the diameter direction is formed in the 2nd nozzle 30 and a 1st propellant nozzle hole 11 for jetting the high pressure jet water W in the obliquely backward direction is formed in the 1st nozzle 10 and a 2nd propellant jet nozzle hole 31 for jetting the high pressure jet water W in the obliquely backward direction is formed in the 2nd nozzle 31 and the inside surface of the pipe line 50 is cleaned with the two nozzles 10, 30.