A recording apparatus has a stacker that receives a discharged recording medium. An engagement mechanism removably attaches the stacker to a discharge section of the apparatus and includes a first engagement portion provided in the discharge section; a second engagement portion, on the stacker, that engages with the first engagement portion; and a guidance portion that guides the second engagement portion into the first engagement portion and extends in an upward direction. The second engagement portion is biased, by a biasing unit on the stacker, in the upward direction so as to move in the guidance portion. When an external force that opposes the biasing force is applied to the stacker and that external force is released, the second engagement portion rises due to the biasing force, is guided by the guidance portion, and engages with the first engagement portion.