The present patent application discloses a weld mask, which has a weld cap, a protection plate, a filter and a press block. The weld cap has a through-hole. A scaleboard pedestal is installed on the edge of the through-hole. The scaleboard pedestal raises towards the inside of the weld cap and encompasses the through-hole. The protection plate, the filter and the press block are installed in the scaleboard pedestal successively. A raised snap-gauge is installed on the outside of the scaleboard pedestal. The snap-gauge includes a hole. An elastic snap joint is installed on the edge of the press block. The snap joint includes a hook and a reducible resilient trip. The top and bottom of the resilient trip connect with the press block and the hook respectively.
