A bicycle operating device comprises a base member, a switch structure, an operating structure, and a controller. The switch structure comprises a first electrical switch and a second electrical switch. The first electrical switch has a first operated state. The second electrical switch has a second operated state. The operating structure includes an operating member. The controller is configured to respectively generate a first control signal and a second control signal based on a first signal pattern and a second signal pattern. The first signal pattern includes a first combination of the first operated state and the second operated state. The second signal pattern including a second combination of the first operated state and the second operated state. The second combination is different from the first combination.