A new aspect of the complex of after-image phenomena is described. It consists of the appearance of lines connecting initially separated after-images, if they are observed against a flickering background. These lines appear during the fading of the after-image. The after-images were produced by various configurations of Xenon flashes, the flickering background by a standard photo stimulator. The phenomena was called after-image fusion not to be confused with binocular fusion. The report is qualitative. The main conclusion reached is the actual existence of the fusion phenomenon. Possible influences of conditioning or suggesting were debated and thought of small importance. The phenomenon casts some doubts on the simple mechanistic retinal origin of the after-images.