Numerical solution for the roller elastohydrodynamic lubrication (EHL) contacts with longitudinal surface roughness under fully flooded and starved conditions was obtained. The results showed that the lubricating performance in the middle and the end parts of the roller was different. Owing to the side leakage effect, the film thickness at the end parts of the roller was much lower than that in the middle part of the roller. Oscillations of the film thickness and pressure could be caused by the surface roughness. Under pure rolling condition, the wavelength of the film oscillation equaled the wavelength of the surface roughness, while the amplitude was larger than that of the roughness. Surface roughness could reduce the film thickness, especially for the starved EHL contacts. The smaller the thickness of the oil supply layer was, the easier the starvation in the roller contact could be. In addition, when the oil supply quantity is specified, larger amplitude and smaller wavelength are more harmful to the lubricating performance of the roller contacts. 