Retractable telescopic gangway for getting on and/or getting off boats of persons comprising: - a main transit platform that develops predominantly along a longitudinal axis and defines a first upper floor plan; - at least one auxiliary transit platform, telescopically coupled with said main platform, operably connected with actuation means suitable to position it automatically and selectively between a rest position, in which said auxiliary platform is contained in the overall dimensions defined by said main platform, and an operating position in which said auxiliary platform projects axially from said main platform and defines a second upper floor plan which constitutes an axial appendage of said first upper floor plan together with which it is accessible to the user; - a plurality of gripping uprights coupled with at least one of the side edges (2a, 2b, 4a, 4b) of said main platform and said auxiliary platform and configured to be selectively automatically place between a passive position, in which said gripping uprights are in non-operative conditions and arranged along a first linear direction (Z') parallel to said longitudinal axis of said main platform, and an active position, in which said gripping uprights are in operative conditions and protrude upwardly from at least one of said side edges (2a, 2b, 4a, 4b) of said main platform and said auxiliary platform along a second linear direction which defines a substantially right angle with said longitudinal axis of said main platform in such a way as to be available for the grip of the user's hand and to contribute to provide a safety railing during the passage of said user on said upper floor plans (3, 6) of said transit platforms (2, 4), characterized in that it comprises fulcrum means provided at each of said gripping uprights, and at least one control rod operatively connecting through said fulcrum means said gripping uprights of at least one of said side edges (2a, 2b, 4a, 4b) of said transit platforms (2, 4) and partly coupled with said auxiliary platform in such a way that said actuation means simultaneously position, by means of said control rod and said fulcrum means, said gripping uprights between the active position and the passive position while moving said auxiliary platform between said rest position and said operating position. - a main transit platform that develops predominantly along a longitudinal axis and defines a first upper floor plan; - at least one auxiliary transit platform, telescopically coupled with said main platform, operably connected with actuation means suitable to position it automatically and selectively between a rest position, in which said auxiliary platform is contained in the overall dimensions defined by said main platform, and an operating position in which said auxiliary platform projects axially from said main platform and defines a second upper floor plan which constitutes an axial appendage of said first upper floor plan together with which it is accessible to the user; - a plurality of gripping uprights coupled with at least one of the side edges (2a, 2b, 4a, 4b) of said main platform and said auxiliary platform and configured to be selectively automatically place between a passive position, in which said gripping uprights are in non-operative conditions and arranged along a first linear direction (Z') parallel to said longitudinal axis of said main platform, and an active position, in which said gripping uprights are in operative conditions and protrude upwardly from at least one of said side edges (2a, 2b, 4a, 4b) of said main platform and said auxiliary platform along a second linear direction which defines a substantially right angle with said longitudinal axis of said main platform in such a way as to be available for the grip of the user's hand and to contribute to provide a safety railing during the passage of said user on said upper floor plans (3, 6) of said transit platforms (2, 4), characterized in that it comprises fulcrum means provided at each of said gripping uprights, and at least one control rod operatively connecting through said fulcrum means said gripping uprights of at least one of said side edges (2a, 2b, 4a, 4b) of said transit platforms (2, 4) and partly coupled with said auxiliary platform in such a way that said actuation means simultaneously position, by means of said control rod and said fulcrum means, said gripping uprights between the active position and the passive position while moving said auxiliary platform between said rest position and said operating position.