An adjustable chair for patients undergoing dental procedures comprising a seat, back and leg rest. The seat is attached to a base with rotating adjustable members and a screw rod is used raise the seat from a lowered position of about 18 inches to a height of about 43 inches, thereby allowing the person performing the procedure to select either a seated or standing position. Further screw rod assemblies permit the back to recline to 15 to 30 degrees and the leg rest to raise to a level that is substantially parallel with the seat.