The utility model relates to a roller body structure of a conveying roller, which belongs to an art field of a roller type conveying device. The utility model is used to provide convenience for the roller conversion. The utility model comprises a roller body and a roller shaft. The improvement of the utility model is that an outer contour of one end of the roller body expands to the outside in a shape of a trumpet. The trumpet shaped roller provided by the utility model can implement the conversion of different height and conveying direction etc within a certain range. And the roller is significantly characterized in a simple and easy operation and a small investment and land occupation. The utility model has a simple structure, which is easy to change the structure size, according to the utilizing demand and is suitable for the application in the conveying roller with a changing transportation table height.