To provide a component for a bicycle which can be attached to a frame stably, and to provide an attachment structure of the component for the bicycle.SOLUTION: A component 40 for a bicycle includes: a housing 42 which supports a crank shaft 32A of a bicycle; and a first attachment part 44 which is used to attach the housing to a frame 22D of the bicycle. The first attachment part is configured to provide force acting in a direction such that the force separates the housing and the frame from each other to the housing and the frame.SELECTED DRAWING: Figure 9
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