Device for regulating the blood glucose concentration of a diabetes patient, said device comprising: measuring means for measuring the blood glucose concentration of the diabetes patient； pumping means for either introducing glucagon into the patient's body or introducing glucose into the patient's bloodstream, selectively, or for introducing insulin into the patient's body, for example by means of at least one hypodermic needle to be inserted into the patient's body； control means that are adapted to receive signals from the measurement means that are representative of said concentration, and that are adapted to control the pumping means based on at least one reference value for said concentration introduced in advance into the media of control and a program, so that said concentration is regulated； the device being configured so that the measuring means and the pumping means are adapted to be in substantially permanent contact with the body fluid or blood of a patient, characterized in that the control means comprise a program that incorporates an adjustable curve glucagon injection represented by a first formula (ml (E) / mmol of fall / l / unit of time) and an adjustable insulin injection curve represented by a second formula (ml (E) / mmol of rise / l / unit of time) corresponding to an amount of insulin or glucagon introduced, respectively, into the patient's body, and the nominal glucose concentration in the patient's blood as a reaction to it.Dispositivo para regular la concentración de glucosa en la sangre de un paciente de diabetes, comprendiendo dicho dispositivo: medios de medición para medir la concentración de glucosa en la sangre del paciente de diabetes； medios de bombeo para o bien introducir glucagón en el cuerpo del paciente o bien introducir glucosa en el torrente sanguíneo del paciente, selectivamente, o para introducir insulina en el cuerpo del paciente, por ejemplo por medio de al menos una aguja hipodérmica que ha de ser insertada en el cuerp
