In this study, the stresses occurring in the thermoplastic composite disc were investigated by numerical analysis. Assuming that the modulus of elasticity does not change with temperature, temperature distributions of 20 oC, 40 oC, 60 oC, 80 oC, 100 oC were taken as reference in the study. Composite materials are created by combining the best properties of two or more materials or by creating a new property. Thermoplastic composites, on the other hand, are bendable and ductile. It is vital to know the thermal behavior of these materials, which are preferred in many areas of technology. At the end of the numerical analysis, the radial and tangential stress values calculated at high temperatures; It has been observed that it is greater than the radial and tangential stresses calculated at low temperatures. It has been observed that the tangential stresses are greater than the radial stresses. It was concluded that the increase in the value of the temperature acting on the thermoplastic disc directly affects the thermal stress distribution and values.