The invention relates to a bag (10) for storing a therapeutic solution, including at least one compartment (11) for receiving a solution and defined by a diaphragm (12). The bag further includes at least one appendage (13) forming an extension of the diaphragm (12) and comprising a writing area (14). The bag for storing a therapeutic solution according to the invention makes it possible to write on the bag with a reduced risk of contamination.
