To suspend an instrument for dental treatments from an instrument holder for dental treatments in such a manner that the distal end of the instrument faces downward, and hence, to prevent the hand of an operator from being injured by hitting the distal end of the instrument, and at the same time, to prevent the distal end of the instrument from being soiled by preventing the instrument for dental treatments from being mounted on the instrument holder.

The instrument for dental treatments comprises an instrument suspending bar 10 for dental treatments which is laterally bridged at a specified gap from a worktable 1 at the lower front side of the worktable 1 for dental treatments, and the instrument 3 for dental treatments having a hook member 5 which is suspended from the instrument suspending bar 10. The instrument 3 for dental treatments is suspended from the instrument suspending bar 10 by the hook member 5 while making the distal end of the instrument face downward.