Abstract: Sewing needle temperature is one of the main problems during sewing of thermoplastic materials. The needle temperatures can cause fabric and sewing thread damage. Many studies have been carried out to understand the parameters which influence needle temperature. Understanding these parameters will help in minimizing the problem of needle heating. Needle heat is influenced by needle, fabric characteristics and the sewing conditions. In this project an attempt has been made to correlate the bending modulus of three different construction 100% cotton fabrics of the same GSM with varying thickness. The fabrics were sewn in the sewing machine at a constant speed of 3500 rpm without sewing thread in 3 different seams. The needle temperature was recorded with the help of an infrared pyrometer at time intervals of 30 sec for 5 min. The highest sewing needle temperature recorded was for the fabric with highest bending modulus among the three samples. Correlation between the fabric bending modulus and sewing needle temperature was calculated using MINITAB v.16.1. The correlation result obtained was positive and linear thus indicating that the bending modulus of the fabric effect the needle temperature.