The hear yield stress and its temperature dependence of various glassy polymers were measured by tensile and/or compression testing. It was found that the relationship between reduced yield stress by an interchain effect and the characteristic ratio proposed by Wu could not explain our results, especially the temperature dependence of shear yield stress. With two modifications, however - expression of temperature dependence, and size of the effective moving unit - a new relationship was developed that showed good correspondence to experimental data. Shear yield stress and its temperature dependence should be represented by the characteristic ratio, cohesive energy density, glass transition temperature and size of the effective moving unit, (V-w/n(V))(1/3), where V-W and n(V) are the van der Waals volume of a repeat unit and the number of statistical skeletal units in a repeat unit, respectively.