An above ground sprinkler is revealed. The ground sprinkler includesa channel controller, a housing with a driving member mounted therein,an adjustment part, a locking plate, a first cover, and a second cover. Atube is extended to form two plates with a retaining groove therebetween.A rib is disposed on an outer side of the plate. The first cover includes acolumn part with an insertion part while the second cover includes atongue part. Locking parts are disposed on the insertion part. Theinsertion part is fitted over the plates while the ribs of the plates arelocked with the locking parts. When the second cover is covered over thefirst cover, the tongue part is mounted into the retaining groove so that thetwo plates are leaning against and locked by the locking parts tightly,unable to be released.
