A nail magazine for a nailer comprises a base, a cover pivotally and elastically connected to the base, and a receiving disc. Once the cover is pulled outward, it can be pushed a certain angle away from the base automatically. On a side of the cover are formed an ear and a rotary shaft. The receiving disc is correspondingly provided with a rotary member. By disengaging the cover from the base and moving it to an angle and then keeping moving it, the receiving disc can be moved out of the base completely, for easy nail loading. Therefore, the operation is simple, quick and can be done with one hand.