Circuit board

The invention provides a circuit board on which a slot and a radiator fixing structure are arranged side by side, wherein the radiator fixing structure comprises a support component, two fixed frames fixed on the support component, two fixed poles and a plug connector; the two fixed poles and the two fixed frames form a framework structure; the plug connector can be accommodated in the framework structure detachably; the support component is provided with connecting parts; and the connecting parts are formed at two opposite edges of the support component in an extruded way and arranged between two extension lines of the other two edges of the support component in a direction parallel to an extension direction of the slot. The circuit board has the advantage of higher space utilization rate.