A detection method for detecting the leak of fluid in a fluid distribution network that comprises a main pipe to which a main fluid meter is connected, and secondary pipes depending from the main pipe and to which secondary fluid meters (CCi) are connected, the detection method comprising the following steps that are repeated over successive measurement periods, themselves subdivided into time intervals: - for each time interval of a given measurement period, acquiring a main measurement taken by the main fluid meter and representative of the quantity of fluid distributed via the main pipe during said time interval, and, for each secondary fluid meter (CCi), acquiring a secondary measurement taken by said secondary fluid meter and representative of the quantity of fluid that is distributed during said time interval via the secondary pipe to which said secondary fluid meter is connected; - for each time interval of the given measurement period, calculating a comparison value representative of the main measurement and the sum of the secondary measurements; - derive from the comparison values whether or not a fluid leak has occurred during the given measurement period, characterised in that the detection method comprise, for each secondary fluid meter (Cci), of step of evaluating a first secondary measurement representative of the quantity of fluid that is distributed via the secondary pipe to which said secondary fluid meter (CCi) is connected during the first time interval of the given measurement period, which is determined by subtracting: --from a total secondary measurement representative of the quantity of fluid distributed via the secondary pipe to which said secondary fluid meter is connected up to the beginning of the measurement period following the given measurement period the sum: - of a total secondary measurement representative of the quantity of fluid distributed via the secondary pipe to which said secondary fluid meter is connected up to the beginning of the given measurement period; - and of the sum of the secondary measurements for all the time intervals of the given measurement period following the first time interval. - for each time interval of a given measurement period, acquiring a main measurement taken by the main fluid meter and representative of the quantity of fluid distributed via the main pipe during said time interval, and, for each secondary fluid meter (CCi), acquiring a secondary measurement taken by said secondary fluid meter and representative of the quantity of fluid that is distributed during said time interval via the secondary pipe to which said secondary fluid meter is connected; - for each time interval of the given measurement period, calculating a comparison value representative of the main measurement and the sum of the secondary measurements; - derive from the comparison values whether or not a fluid leak has occurred during the given measurement period, characterised in that the detection method comprise, for each secondary fluid meter (Cci), of step of evaluating a first secondary measurement representative of the quantity of fluid that is distributed via the secondary pipe to which said secondary fluid meter (CCi) is connected during the first time interval of the given measurement period, which is determined by subtracting: --from a total secondary measurement representative of the quantity of fluid distributed via the secondary pipe to which said secondary fluid meter is connected up to the beginning of the measurement period following the given measurement period the sum: - of a total secondary measurement representative of the quantity of fluid distributed via the secondary pipe to which said secondary fluid meter is connected up to the beginning of the given measurement period; - and of the sum of the secondary measurements for all the time intervals of the given measurement period following the first time interval. --from a total secondary measurement representative of the quantity of fluid distributed via the secondary pipe to which said secondary fluid meter is connected up to the beginning of the measurement period following the given measurement period - of a total secondary measurement representative of the quantity of fluid distributed via the secondary pipe to which said secondary fluid meter is connected up to the beginning of the given measurement period; - and of the sum of the secondary measurements for all the time intervals of the given measurement period following the first time interval.