According to the present disclosure, an electrode having an electrode mixture layer with a desired film thickness can be stably produced. A producing method disclosed herein includes detecting the surface position of a mixture coated film by a first sensor; detecting the surface position of a second roll by a second sensor; detecting the film thickness of the mixture coated film based on detection results of the first sensor and the second sensor; and adjusting a relatively rotation speed of a third roll based on the film thickness. And, the detected positions of the first sensor and the second sensor in a circumferential direction of the second roll are substantially identical. Due to this method, the change in the film thickness of the electrode mixed layer of produced electrode can be suppressed.