The purpose of this study was to determine effectiveness of a modified version of Azrin and Foxx's (1971) intensive toilet training method on teaching of toilet skills to children with autism. This method consists of administering extra fluids and a time schedule, but does not use overcorrection procedures. Implementation requires a study of six hours per day. The study was conducted with three children with autism in an educational setting and used a multiple probe design. Both inter-observer and procedural reliability data were collected. Graphical analysis was used to determine effectiveness of a modified version of Azrin and Foxx's method for teaching toilet skills to children with autism. Results of the study indicate that the modified Azrin and Foxx method was effective in teaching dryness and urinating into the toilet at acquisition level to children with autism. Parents of the research subjects were very satisfied with the results.