Background: The aim of the current study was to check the effectiveness of Graston technique on chronic plantar fasciitis patient using instrument assisted soft tissue mobilization tool (IASTM). This was an experimental study using foot and ankle disability index scale as outcome measure. The FADI scale was used as pre and post intervention for 3 weeks with two session per week. Methodology: A simple random sample of 30 people consists of watchmen, nurses, cleaners including 11 males and 19 females from Dr. A. P. J. Abdul Kalam College of physiotherapy, PIMS, Loni. The participants included were between age group of 40-60 years and having knowledge about both in English and Marathi. Illiterate individuals were excluded. Results: Accuracy FADI scale among 30 participants showed result as highly significant with post 20%-30% of difference within 3 weeks. Conclusion: The study concluded that Foot and ankle disability index in pre-post testing of was highly significant (13.5).