In this work, an attempt is made to study the mechanical behaviour of polymer based composite made of hybrid natural fiber reinforcement and hybrid polymeric matrix. The natural fibres used for the reinforcement are Jute fibres and Gongura fibres. Both the fibres are used in the long continuous form and are taken in a standard size of 2mm diameter. The hybrid matrix is prepared with a combination of 75% and 25% by volume of general purpose resin (GP) resin and cashew nut shell liquid (CNSL) oil respectively to increase the green content of the matrix material. Fibres are subjected to alkaline treatment by using different concentrations of alkaline sodium hydroxide (NaOH) for different time periods to improve the adhesiveness and strength of the fibres. Hybrid composites are prepared by using hand layup technique. The composition of composite material was decided based on Taguchi L9 orthogonal array with three parameters and three levels for each parameter were employed in the design of experiments procedure. As per the results of L9 array, nine specimens were prepared for each test. The influence of different parameters on flexural strength of the composite is studied using analysis of variance (ANOVA) technique. Flexural test is conducted to find the maximum flexural stress and maximum deflection. Fatigue test is for finding the maximum fatigue life of the composite. Fracture test is performed to find the fracture behaviour of the material. Vibration test is performed to find out the natural frequency of the hybrid composites prepared.