The concrete hole brush apparatus provides a tool and method for rapidly and effectively cleaning holes drilled in concrete. The holes must be clean of all debris and dust for an effective bond of anchors with the concrete. Brush sizes include ½ inch, ⅝ inch, ¾ inch, ⅞ inch, 1 inch, 1⅛ inch, and 1¼ inch. The apparatus chucks into a variety of power drills, with the shaft size reduced to a chuck tip for best fit to those drills. The measurement indicia ensure that an operator penetrates to the entire hole depth to guarantee cleanliness. The concrete hole brush apparatus saves time in cleaning concrete holes and negates problems in concrete hole inspections by a concrete inspector.