A security unit for transporting rolls of coins for a machine dispensing rolls of coins comprising: - a containment body configured to be associated with a machine for dispensing rolls of coins, said containment body defining a containment space designed to contain a plurality of rolls of coins stacked with one another; wherein said containment body has an inlet portion having an inlet opening designed to allow the insertion of said plurality of rolls of coins and an outlet portion having an outlet opening designed to allow the outflow of said rolls of coins; - first closing means and second closing means associated, respectively, with said inlet portion and with said outlet portion to allow and/or prevent the passage of said rolls of coins; wherein said first and said second closing means (11, 12) can be configured at least in an open condition in which they allow a passage of said rolls respectively from said inlet opening and/or from said outlet opening and at least in a closed condition wherein said first closing means and second closing means close respectively said inlet opening and/or said outlet opening for preventing the passage of said rolls of coins; wherein said second closing means can be activated by a respective portion of said machine for dispensing rolls of coins to define a passage of said second closing means between said closed condition and said open condition; characterised in that said containment body has two stacking channels placed side by side for said rolls of coins, defined internally at said containment body, separated from each other by one separator baffle; wherein said two stacking channels extend between said inlet and outlet openings (4, 6) and comprise two opposite walls defining respective sliding guides configured to receive and guide respective ends of each roll of coins; and wherein, said two stacking channels have, on said opposite walls, two sliding guides for the stacking of rolls of coins in accordance with two stacks side by side. - a containment body configured to be associated with a machine for dispensing rolls of coins, said containment body defining a containment space designed to contain a plurality of rolls of coins stacked with one another; wherein said containment body has an inlet portion having an inlet opening designed to allow the insertion of said plurality of rolls of coins and an outlet portion having an outlet opening designed to allow the outflow of said rolls of coins; - first closing means and second closing means associated, respectively, with said inlet portion and with said outlet portion to allow and/or prevent the passage of said rolls of coins; wherein said first and said second closing means (11, 12) can be configured at least in an open condition in which they allow a passage of said rolls respectively from said inlet opening and/or from said outlet opening and at least in a closed condition wherein said first closing means and second closing means close respectively said inlet opening and/or said outlet opening for preventing the passage of said rolls of coins; wherein said second closing means can be activated by a respective portion of said machine for dispensing rolls of coins to define a passage of said second closing means between said closed condition and said open condition; characterised in that said containment body has two stacking channels placed side by side for said rolls of coins, defined internally at said containment body, separated from each other by one separator baffle; wherein said two stacking channels extend between said inlet and outlet openings (4, 6) and comprise two opposite walls defining respective sliding guides configured to receive and guide respective ends of each roll of coins; and wherein, said two stacking channels have, on said opposite walls, two sliding guides for the stacking of rolls of coins in accordance with two stacks side by side.