There is provided a machining apparatus in which movement of a machining point is a little, restriction on the machining operation of an articulated robot is a little and movement of a worker for the teaching operation is a little. The machining apparatus has an articulated robot which is controlled in attitude according to a teaching operation and has a catch instrument for catching a workpiece at an arm tip thereof, and a machining unit equipped at a fixed portion located within an arm reachable zone of the articulated robot, wherein the machining unit has a working tool having a profiling portion where a machining target portion of the workpiece caught by the catch instrument of the articulated robot is pressed according to the attitude control of the articular robot, and a floating mechanism that pushes the working tool in a press direction of the workpiece.