Abstract: A fixing apparatus for a sprinkler comprises a fixed frame horizontally extending above a ceiling material in a lengthwise direction, an installation frame horizontally extending above the fixed frame in a widthwise direction, an end bracket fastened with the fixed frame and the installation frame to fix an installation position of the sprinkler, and a center bracket having a first side allowing the installation frame to pass therethrough and a second side configured to surround the sprinkler.

Abstract: An end bracket for a sprinkler includes a first vertical plate where a first insertion hole is formed at an upper portion thereof and a first pressing screw, a hooking plate extending from both sides of the first vertical plate in the widthwise direction and where a vertical wall insertion groove where the vertical wall is inserted is formed downward at a lower portion of the hooking plate, and a fitting protrusion mating with a hook portion formed at an upper end of the vertical wall to be bent downward is formed at an inside of the vertical wall insertion groove to protrude upward, and a horizontal plate extending horizontally from an upper end of the first vertical plate in the widthwise direction and where a second pressing screw inserted into an inside thereof to press an upper surface of the installation frame is fastened at a center thereof.