Abstract: Herein disclosed is a manual floor sweeper including a casing, a pair of front and a pair of rear wheels and a pair of roll brush brooms juxtaposed longitudinally in parallel with each other in a manner to rotate inwardly in response to the rotation of the wheels so as to sweep up the dust on the floor into the hollow space of the casing. Two substantially enclosed housings are juxtaposed to each other at the both sides of the casing. Each of two gear trains is accommodated in each of the housings and includes a pair of drive gears, a pair of brush actuating gears, and a pair of coactive gears.