A device for splicing the free end of a strip of web material to a homologous strip of web material being supplied includes a first moving element and a second moving element, each of which is able to function alternatively as retention structure for the free end and as guiding structure for the web. The moving elements are, at least in part, translatable with respect to one another for connecting the free end to the web, performing the operation of splicing. The first and the second moving elements are selectively orientable between a position of opening, in which the moving element has a gripping formation exposed to receive the free end, and a position of closing, in which the gripping formation faces the other moving element of the device to allow the free end to connect to the web.