An electrical connection device is described which comprises a container comprising at least two seats, each seat being configured for containing an electrical connection element comprising a first contact element sliding contact element and a second sliding contact element, each connectable to a respective electric cable, and further comprising a tubular element inserted inside the container so that they can be rotated one with respect to the other, being the first sliding contact element integrally connected to the container and the second sliding contact element integrally connected to the tubular element to make a sliding contact between the contact elements.