The present invention relates to a blood treatment device having at least one reading and/or writing apparatus which is configured to read information from a card and/or to write information to a card, and having at least one receiver into which the card can be introduced and from which the card can be removed, wherein the receiver is arranged such that information can be read from the card and/or information can be written to the card by means of the reading and/or writing apparatus in the state of the card introduced into the receiver, wherein the receiver is not horizontal, but rather extends slanted upwardly with respect to the horizontal in the direction of introduction of the card.
