An adjustable pedal for use with a clipless pedal includes a pedal body that includes a passage formed therein, a driving member that is mounted in the pedal body, a first cleat and a second cleat that are coupled to the driving member and are located in the passage for being engageable with and attachable to a clipless pedal. When the driving member is operated in a first state, the first cleat and the second cleat are driven in such a way that the first cleat and the second cleat are moved toward each other in the passage; and when the driving member is operated in a second state, the first cleat and the second cleat are driven in such a way that the first cleat and the second cleat are moved away from each other in the passage.