A structure model for K2O⋅2WO3 glass has been selected and proposed out of many possible models on the basis of the radial distribution curve calculated from the X-ray diffraction pattern. The adequacy of each model was judged primarily from the agreement of the radial distribution curve calculated for the model as a sum of the pair functions to the curve obtained experimentally. It was nearly impossible, however, to calculate a radial distribution curve for every possible model, so the adequacy of each model was evaluated beforehand on the basis of some criteria including Pauling's rule of parsimony. After screening of models, three models A, B, C remained in which each structure unit consisted of a WO4 tetrahedron and a WO6 octahedron combined with two K+ ions. The model A has a layer-structure and the model B and C have chain-like one (Fig. 4). Since W-W atomic pairs strongly affected the radial distribution curve, several structural parameters were changed in order to know how W-W distances varied (Fig. 6, 9, 12). For the two models other than the chain-like model B, W-W distances did not correspond well to those in the experimental radial distribution curve. Two structures, BS and BAS, having the different sites of tetrahedra with respect to an octahedron were possible for the model B (Fig. 1 (a), 8). The W-W distances for the model BS with the particular combination of the structural parameters (P in Fig. 9) showed good correspondency to those in the experimental radial distribution curve. After the introduction of disorder based on statistical distribution and structure flexibility, the curve calculated for the model BS resulted in good agreement with the experimental one (Fig. 11). The model BAS was also found to be acceptable. In conclusion, the layer-structure model A with the 6-membered rings of W-atoms, which seemed to be more suitable for glass structure, was concluded to be inadequate, and the 3-membered rings of W-atoms similar to those found in the crystalline structure were suggested to exist in the glass.