To provide a propeller, an agitating machine, and a conveyor for efficiently delivering, agitating, and mixing fine particles and fluids to solve adverse effects caused by hard materials and lumps contained in the article to be handled.

In this propeller 1, a plurality of blades 3, 3 and 3 are spirally spaced from one another in line on the outer periphery of a rotary shaft 2, and a front end 4 in the spiral direction (arrow F) of each of blades 3b is crossed (at a crossing width T) with a rear end 5 in the spiral direction of the adjacent blade 3a going forward in the spiral direction relative to the direction of an axial core C of the rotary shaft 2. The propeller 1 is used for a conveyor V together with a cylinder 8 rotatably accommodated in the propeller 1, and a motor 13 connected with the propeller 1 and rotating the propeller 1 around the axial core C of the rotary shaft 2.