A method of controlling attitude of a CNC laser working machine for controlling an attitude of the nozzle of the CNC laser working machine, which performs three dimensional working, with respect to the surface to be worked. Two kinds of interpolating outputs (Pα, Pβ) for the axes α and β are outputted from an interpolator (1) which interpolates values of the axes α, β, X, Y and Z, and corotation correction means (2) reads out interpolating output (Pα) for the axis α and computes a corotation correction value (Δβ) for the axis β corresponding to the gear ratio between gears which couple the horizontal axis to the vertical axis. The corotation correction value (Δβ) is added to the interpolating output for the axis β by the adding device (4), and corotation correction for the axis β for an arbitrary gear ratio between the horizontal and vertical axes is made possible.