The present invention relates to a method and apparatus capable of eliminating the effect of offset current that is produced by changes in control voltage and making possible a high-precision measurement of pixel driving current. The method for measuring the pixel driving current, characterized in that it comprises a first step for measuring the offset current flowing to wiring when multiple pixels are all set to the non-lighted state; a second step for measuring the pixel driving current of a predetermined pixel from the difference between the current flowing to the wiring when only a predetermined pixel of the multiple pixels is lighted and this offset current; a third step for repeating the second step, measuring in succession the pixel driving current of a predetermined number of pixels from the multiple pixels, and then resetting all of the multiple pixels to the non-lighted state; and a fourth step for repeating from the first step to the third step and measuring the pixel driving current of the display device, etc. |