To provide a road surface cutting machine capable of connecting a prime mover to a rotating blade driver part with a simple structure to solve a problem of the enlarging size of the entire device.

A belt cover 12 with a drive shaft 11 for a rotating blade 18 attached rotatably at the top end thereof is connected held by the side surface of a prime mover 4 arranged on a cart 1 positioned in parallel with a ground by both side front and rear wheels through a universal joint inclined to a slanted lower side relative to a prime mover output shaft 7 so that it can be rotated in vertical direction under the conduction that it is inclined about an inclined output shaft 13. Then a rotating blade operating handle 29 for rotating a rotating blade 18 at the top end of the belt cover in vertical direction under the condition that it can be rotated about the inclined output shaft 13 under inclination is installed between the top end of the belt cover 12 and the rear upper part of a machine body.