To provide the managing device of a bicycle lot for a season ticket using a copy diversionary sheet.

This is an entrance/exit management type bicycle parking lot system equipped with an automatic gate and a managing device for controlling the opening and closing of the automatic gate according to data recorded in the ticket of the bicycle parking lot. This system is provided with a bar code reader 12, window 14 for presenting a season ticket for reading a bar code printed on the season ticket using a copy diversionary sheet, and discriminating function 18 for reading the bar code printed on the season ticket by the bar code reader 12, and judging the opening and closing of the automatic gate by analyzing the read result. In this case, the window 14 for presenting the season ticket is covered with a transparent material such as glass, and the window 14 for presenting the season ticket is constituted as a close structure so that the generation of failure due to the intrusion of moisture or foreign matters can be prevented. Thus, the outdoor setting of a managing device 10 of the bicycle parking lot can be easily attained, and the setting costs can be reduced. Also, the season ticket obtained by applying laminate working to the copy diversionary sheet is used so that any illegal use can be prevented, and the durability of the season ticket can be improved.