Abstarct: Roundabouts are used in many countries as a means of controlling intersections and efficiency of traffic operations. There are many methods for the entry capacity is determined as a function of circulating flow and the geometric properties of the roundabout. The entry capacity in roundabouts indicates the maximum volume of entry vehicles. The purpose of creating rounabouts is to increase their capacity and reduce the delay caused to vehicles. The effect of pedestrians on reducing the capacity of the roundabouts is a subject that has received less attention, while various factors such as the volume of pedestrian traffic, speed of pedestrian, the direction of pedestrian entry to the pedestrian crossing (zebra), etc. , are among the factors influencing the effect of pedestrians. The number of entry lines to the roundabout is also one of the influencing factors on the roundabout entry capacity. In this research, we try to find out its effect on the entry capacity of the roundabouts and compare one-lane and two-lane roundabouts. In this Study, Using Obtained data such as entry and conflicting circulating volume, the speed and acceleration of vehicles,the flow rate of pedestrian traffic and speed, etc. ,from four one-lane and two-lane entry of roundabout in the city of Mashhad. Using Regression model to determine the effect of pedestrians on the entry capacity of these fields and the difference of this effect in one-lane and two-lane fields. Also, the effect of the direction of pedestrians entering the roundabout on the entry capacity and the effect of pedestrian traffic on the speed of vehicles were also investigated. Finally, it was found that the impact of pedestrians at the entry of two-lane roundabouts is higher than at the entry of one-lane roundabout. As a result, the increase of the entry line increases the impact of the pedestrian occupancy rate on the entry capacity of the roundabout.