To provide a circular saw with a dust collector, capable of performing a cutting work without scattering cut chips to surroundings.

In the circular saw with the dust collector 1, a 1st cut-chip suction port 15b is formed on a main body side saw blade cover 15a and a 2nd cut-chip suction port 19a is formed on a cut-chip guide 19 disposed in front of a cutting position, and these cut-chip suction ports 14b, 19a are connected via a fork-shaped dust collecting hose 6 to a dust collecting container 53 of the dust collector 5. Since the cut chips scattered to surroundings are sucked towards the side of the cut-chip guide 19 and the cut chips scattered to the rotating direction of the circular saw blade are sucked towards the side of a main body side saw blade cover 14a, the cut chips generated are hardly scattered to the surroundings. Accordingly, a good work environment for cutting operation can be maintained and a cleaning operation after the operation is easily performed.