An apparatus (10) for reading out, in a time-saving and reliable way, X-ray information stored in storage phosphor plates with an input unit (12) in which a plurality of cassettes (14) in which a storage phosphor plate to be read out is respectively located, can be input. A read-out unit (22) is located beneath the input unit (12) and in which storage phosphor plates can be read out, it being possible to remove a storage phosphor plate from a cassette (14) located within the input unit (12) and to convey it to the read-out unit (22) located beneath the input unit (12) in order to read out the storage phosphor plate, and to convey it back into the cassette located within the input unit (12) after having read out the storage phosphor plate, an output unit (16) which is adjacent to the input unit (12) and in which cassettes (18) can be output, and a moving device for moving the cassette (14) located within the input unit (12) the storage phosphor plate of which has been read out in the read-out unit (22) located beneath the input unit (12) along a substantially horizontal path of movement to the output unit adjacent to the input unit (12).