The author investigated the influence of changes in the convergence angle and temperature on the glass slab on the quantity of vertical discrepancy of the cemented bridges.The apparatus and metal mold used were capable of varying the convergence angle of both a premolar and a molar from 4degrees to 14degrees at increments of 2degrees.When measured with cements, the film thickness did not decrease except at convergence angles between 8 and 10degrees.The film thickness of bridges was influenced by the convergence angle of molar much more than of premolar.When the convergence angle of premolar increased and the molar decreased, the slant of the bridges was distinctly observed, but when the condition was reversed, such phenomenon was not seen.As for the consistency and the film thickness test based on ADA specification No.8, no marked decrease of the consistency of the film thickness was observed with decreases in temperature.However, by shortening the operation time to 2 minutes which included mixing time, both the consistency and the film thickness decreased.Also, film thickness of bridges decreased markedly with decreases of temperature.It is suitable the findings indicate that the mixing temperature should be 13℃ to 15℃ with 60% relative humidity.