A reclining device includes: a first member; a pawl having external teeth; a second member; a cam; and a spring, which biases the cam to move the pawl in the direction where the external teeth engage with the internal teeth, the pawl guide includes a first pawl guide and a second pawl guide, a wedge-shaped space is formed between the pawl and the first pawl guide, and a width of the wedge-shaped space is gradually reduced in a direction where the pawl is guided, an end of the spring is inserted into the wedge-shaped space, and the end of the spring is directly wedged into the wedge-shaped space, thereby pressing the pawl against the second pawl guide.