Rhizoctonia solani Kühn (teleomorph = Thanatephorus cucumeris (Frank) Donk) is the most important soil-borne fungal pathogen cause causes significant establishment with typical symptoms of collar rot, seedling death, stunted growth and root rot in tomato. Fungus isolated from diseased plants was identified as Rhizoctonia solani by comparing its morphological characters. Isolates were further confirmed as AG-4 by hyphal fusion test with tester isolates and DNA analysis. Present study is the first report of R. solani AG-4 effecting tomato in Pothwar region, Pakistan.