Safety member and muzzle of nail gun having the same

A safety member adapted for use in a muzzle of a nail gun and operable to allow the nail gun to switch to a nail striking state, the muzzle of the nail gun including a plate member and a barrel member, the plate member and the barrel member cooperatively defining a nail passage which is for passage of a nail, and a gap which spatially communicates with the nail passage, said safety member being slidable in a nail striking direction of the nail, said safety member comprising a slider adapted to be disposed in the gap, and having a flat surface that is adapted to face the plate member, a platform that protrudes from said flat surface toward the plate member and that cooperates with said plate member to define a nail ejection opening therebetween, and an abutment end that extends from said platform and that extends beyond said nail ejection opening for contact with an object to be fastened.