An account of numerical solutions to the isothermal and flooded elastohydrodynamic lubrication(EHL)of a logarithmic profile roller, which is rolling over a flat plane,is givenThe analysis takes account of sidew ays flow of lubricant in the inlet region of the contactWhen the results are p resented in suitable nondimensional groups,it is shown that more uniformly pre ssure and shape of the film distributing in axial direction is taken place under light loadingAs the increase of the load,the end closure is displayed and the oil pressure rises sharply at the endsThe seal action formed by the end closu re makes the film thickness a littleAnd the minimum film thickness is transfer red from the central to the ends and the value is reduced rapidlyAs the increa se of the speed,the end closure becomes much seriousThe optimum crowning value obtained in EHL state is larger than the design value obtained in elastostatic contact state for the same working conditionsIn order to verify the correctnes s of theory,optical interferometry is applied to measure the oil film thickness between a logarithmic profiled roller and a glass plate under pure rolling condi tionsIt is found the agreement between numerical solutions and experiments is very good