Multi-pole electric connection device comprising a multi-pole male electric connection device and a multi-pole female electric connection device, said devices (10, 20) comprising a front capsule (B1, A1) comprising a seat inside which a module-holder core (B2, A2) is adapted to be inserted, comprising suitable recesses (B11, B12, A11, A12) designed to contain contact modules (B31, B32, A31, A32) for contacts of an electric type and/or for transporting signals (B41, B42, A41, A42), said front capsule (B1, A1) and said module-holder core (B2, A2) being made of conductive material to keep a screening between the contacts (B41, B42, A41, A42) and to keep unaltered the characteristics of the transmitted signals, said devices (10, 20) being mutually connectable by means of respective male contacts (B41, B42) coupled with female contacts (A41, A42), - the module-holder core (B2, A2) comprises a system for propagating the electric signal between the module-holder core (B2, A2) characterized in that the front capsule (B1, A1), comprising a contact element (B5, A5, R) designed to keep in contact the module-holder core (B2, A2) with the front capsule (B1, A1) to perform a screening between the contacts (B41, B42, A41, A42) and to keep unaltered the characteristics of the transmitted signals, the contact element (B5, A5, R) of the system for propagating the electric signal being inserted into a through-hole (B15, A15) obtained in the module-holder core (B2, A2), the contact element (B5, A5, R) being formed of a conductive plug (B5, A5) equipped at an end with a head (B51, A51) projecting from the module-holder core (B2, A2), and at an opposite end with a female terminal (B52, A52) designed to house a male contact to keep in contact the module-holder core (B2, A2) with the front capsule (B1, A1); and - the connecting device comprises at least one first recess (B12, A12) designed to contain contact modules (B32, A32) obtained substantially in a central part of the module-holder core (B2, A2) and at least one second recess (B11, A11) designed to contain contact modules (B31, A31) obtained between the first recess (B12, A12) and an external edge of the module-holder core (B2, A2). - the module-holder core (B2, A2) comprises a system for propagating the electric signal between the module-holder core (B2, A2) characterized in that the front capsule (B1, A1), comprising a contact element (B5, A5, R) designed to keep in contact the module-holder core (B2, A2) with the front capsule (B1, A1) to perform a screening between the contacts (B41, B42, A41, A42) and to keep unaltered the characteristics of the transmitted signals, the contact element (B5, A5, R) of the system for propagating the electric signal being inserted into a through-hole (B15, A15) obtained in the module-holder core (B2, A2), the contact element (B5, A5, R) being formed of a conductive plug (B5, A5) equipped at an end with a head (B51, A51) projecting from the module-holder core (B2, A2), and at an opposite end with a female terminal (B52, A52) designed to house a male contact to keep in contact the module-holder core (B2, A2) with the front capsule (B1, A1); and - the connecting device comprises at least one first recess (B12, A12) designed to contain contact modules (B32, A32) obtained substantially in a central part of the module-holder core (B2, A2) and at least one second recess (B11, A11) designed to contain contact modules (B31, A31) obtained between the first recess (B12, A12) and an external edge of the module-holder core (B2, A2).