Hydraulic distributor comprising: - a plurality of modules connected to each other in a removable manner, where each of said modules comprises a relative body provided with: at least one supply channel connectable to a supply source of a work fluid under pressure, at least one discharge channel connectable to a discharge tank, at least a first and a second command line (6, 7) connectable to a relative user point, valve means operable to regulate the flow of the work fluid towards said command lines (6, 7), activation means for activating said valve means, where the body of each of said modules defines two coupling surfaces opposing each other, each one of which is adapted to lean against a coupling surface of an adjacent module, said supply channel and said discharge channel each facing said coupling surfaces and defining a relative inlet port (4a, 5a) and a relative outlet port (4b, 5b) of the work fluid, where said inlet ports (4a, 5a) are arranged facing the relative outlet ports (4b, 5b) and face the relative coupling surfaces; - sealing means positioned between the coupling surfaces of two of said modules adjacent to each other, at said supply and discharge channels (4, 5), where onto at least one of the coupling surfaces of two modules adjacent to each other, is defined a relative seat for the housing of said sealing means, where said seat is arranged around said inlet ports (4a, 5a) and/or said outlet ports (4b, 5b); - mutual connecting means of said modules which comprise, for each of said modules, at least one threaded element which engages in a removable manner with the threaded elements of the adjacent modules for their mutual fixing, where said at least one threaded element is inserted into a relative through hole defined on the body of the relative module and where said hole is separate from said supply channel and from said discharge channel, and where said threaded elements are separate from said supply and discharge channels (4, 5); where said valve means are contained inside the relative body of each of said modules and are positioned between said supply and discharge channels (4, 5) and said command lines (6, 7); characterized by the fact that each of said coupling surfaces has a relative seat for the housing of said sealing means, the seats defined on the coupling surfaces facing each other of two of said adjacent modules being substantially aligned with each other. - a plurality of modules connected to each other in a removable manner, where each of said modules comprises a relative body provided with: at least one supply channel connectable to a supply source of a work fluid under pressure, at least one discharge channel connectable to a discharge tank, at least a first and a second command line (6, 7) connectable to a relative user point, valve means operable to regulate the flow of the work fluid towards said command lines (6, 7), activation means for activating said valve means, where the body of each of said modules defines two coupling surfaces opposing each other, each one of which is adapted to lean against a coupling surface of an adjacent module, said supply channel and said discharge channel each facing said coupling surfaces and defining a relative inlet port (4a, 5a) and a relative outlet port (4b, 5b) of the work fluid, where said inlet ports (4a, 5a) are arranged facing the relative outlet ports (4b, 5b) and face the relative coupling surfaces; - sealing means positioned between the coupling surfaces of two of said modules adjacent to each other, at said supply and discharge channels (4, 5), where onto at least one of the coupling surfaces of two modules adjacent to each other, is defined a relative seat for the housing of said sealing means, where said seat is arranged around said inlet ports (4a, 5a) and/or said outlet ports (4b, 5b); - mutual connecting means of said modules which comprise, for each of said modules, at least one threaded element which engages in a removable manner with the threaded elements of the adjacent modules for their mutual fixing, where said at least one threaded element is inserted into a relative through hole defined on the body of the relative module and where said hole is separate from said supply channel and from said discharge channel, and where said threaded elements are separate from said supply and discharge channels (4, 5); where said valve means are contained inside the relative body of each of said modules and are positioned between said supply and discharge channels (4, 5) and said command lines (6, 7); characterized by the fact that each of said coupling surfaces has a relative seat for the housing of said sealing means, the seats defined on the coupling surfaces facing each other of two of said adjacent modules being substantially aligned with each other.