The invention relates to a machine (M) for dispensing products and/or services which are paid for with banknotes. The invention is of the type that comprises a banknote reader (L) which is positioned behind a horizontal insertion slot (F1) and which is used to process banknotes inserted by a user. The aforementioned reader is equipped with an essentially-horizontal inlet slot (F2) serving as an inlet for banknotes. According to the invention, the insertion slot (F1) is disposed at a lower level in relation to the inlet slot (F2) along a vertical reference axis (V). In addition, the machine comprises a guiding interface device (1, 2) which is disposed between the insertion slot (F1) and the inlet slot (F2) such as to guide an inserted banknote from the insertion slot (F1) to the inlet slot (F2).