Background: Plantar fasciitis (PF) is a condition characterized by the plantar fascia's deterioration, which is brought on by constant strain at the calcaneus, where it attaches. This leads to heel pain and functional impairment. Purpose: to compare between integrated neuromuscular inhibition technique (INIT) as well as instrument assisted soft tissue mobilization (IASTM) in treatment patient with chronic PF. Patients and Methods: A total of 54 participants, comprising both genders aged between 40 and 60 years, were randomly divided into three groups.Group (A): got conventional treatment of PF. Group (B): got conventional treatment in addition INIT. Group (C):got conventional treatment in addition IASTM.Each group received 4 weeks' treatment; 3 sessions per week. Pain intensity level, pain pressure threshold (PPT), active ankle dorsiflexion ROM (range of motion) and foot functional disability level were measured using visual analogue scale, electrogoniometer, pressure algometer, and foot disability index in Arabic. Results: There was a significant difference decrease in mean value of pain and foot function index (FFI), increase in mean value of pressure pain threshold (PPT) and ankle dorsiflexion ROM within three groups. Post hoc test conducted between groups reveled a favor of INITgroup program (Group B) followed byIASTM group program (Group C) in all variables. Conclusion: Conventional treatment, INIT, and IASTM were effective to decrease pain and score of FFI, increase PPT and dorsiflexion ROM with superiority of INIT group (Group B) followed by IASTM group (Group C).