Strengthening and retrofitting are becoming available options for those important structures as bridges, factories and parking garages which are more economical to be strengthen than to be demolished. This paper presents an experimental program to investigate the behavior of strengthened RC beams using different techniques under fatigue loading. Experimental program including, four specimens, one acts as a control and the rest of specimens were strengthened with near surface mounted (NSM) CFRP strips, externally bonded (E.B) steel plate and casting of an ultra high performance strain hardening cementitious composite (UHPSHCC) layer at the beam soffit techniques. Having the same criteria on the comparative study the area of each strengthening materials was deliberately chosen to obtain the same force gained at the tension side of the strengthened beam. The results indicated that strengthening NSM CFRP strengthening technique is the most convenient technique compared to the other strengthening techniques for strengthening RC beams subjected to fatigue loads.