An operating device for a human-powered vehicle comprises a base structure, a switch unit, and an additional switch unit. The base structure is configured to be mounted to the human-powered vehicle. The switch unit is configured to be activated in response to a user input. The switch unit includes a base member. The additional switch unit is configured to be activated in response to an additional user input. The additional switch unit includes an additional base member. The base member and the additional base member are coupled to the base structure at an attachment axis.