Napier stunting disease is a major constraint in dairy production in Kenya. The disease causes stunted growth and reduction in Biomass. The objective of this study was to screen for tolerant clones to stunting disease. Four hundred clones of Napier Grass Pennisetum purpureum schumach were collected from Bungoma, Mumias, Butere and Busia Districts in Western Kenya in 2008. The clones were then planted in unreplicated nursery at Alupe for pre-screening for tolerance to stunting disease. Out of four hundred clones one hundred and twenty disease free clones with diverse morphological characteristics were selected and planted in a complete randomized block design replicated three times for further screening. Eighty three clones without disease symptoms were planted in a screen house in a randomized block design replicated three times and were artificially challenged with the stunting disease using leafhoppers collected from the Napier grass fields in Alupe. Diseased Napier plants were then planted around the trial to serve as spreader rows. Harvesting of Napier was done at intervals of 8 weeks and data was collected on the incidence and severity of stunting disease using a scale of 1-4, where 1 was no symptoms and 4 was severe. Both fresh and dry matter yield data was collected for each plot and Analysis of data done using SAS. The clones were significantly different (P=0.05) in term