The invention discloses a circuit board, a motor containing the circuit board and a fan and aims to solve a problem of easy damage to layout of a circuit in the prior art. The circuit board comprisesa sheet material having a shaft hole and periphery and a circuit layout arranged on the sheet material, wherein the sheet material is divided into multiple welding regions and multiple idle regions, the welding regions are used for welding leads of a motor stator, each welding region has two end rims along the circumferential direction, two virtual lines extend from the center of the shaft hole along the radial direction of the shaft hole to pass through the two end rims of the same welding region, the multiple idle regions are adjacent to the multiple welding region to form multiple adjacentlines, each idle region is arranged in the area commonly surrounded by the adjacent lines, the two virtual lines passing through the same welding region and the periphery, and the circuit layout is not in the projection scope of the idle region. The circuit board is advantaged in that the problem can be actually solved.