The heat transfer modes of the fabrics are conduction, convection, and radiation. In this paper, using the thermal insulation value tester and the glass plate which covers the fabric in order to immobilize the air in the fabric, the heat transfer by conduction was considered. Analyzing the experimental results, the experimental values nearly coincided with the theoretical values. The influence of the fabric parameters on the heat transfer by conduction had been investigated and the following conclusions were obtained. 1. Supposing that fabric is the mixture of air and fibres, in the system which immobilizes the air in the fabric, the representation for the heat flow rate can be translated as (T1-T4)/[L1/{K1,(1-P)+K2P}A+L2/K3A+1/hA]=q 2. In the system which immobilizes the air in the fabric, the heat flow by conduction through tile fabric decreases with the increasing value of L1/CVf which is considered one of the parameters of the fabric.