NOVELTY - Obtaining borazane, comprises: providing reactor equipped with stirring means and thermostatically controlled at temperature of T1 to 40 degrees C; introducing anhydrous liquid ammonia into the reactor; introducing amine borane complex into the reactor; stirring the mixture until exhaustion of all the amine borane complex; stopping stirring and obtaining a mixture of two phases comprising light phase consisting essentially of anhydrous liquid ammonia comprising borazane, and heavy phase consisting essentially of amine corresponding to amino borane complex; and isolating borazane and vacuum drying.    USE - The method is useful for obtaining borazane (claimed), which is used to produce hydrogen for fuel cell applications.    ADVANTAGE - The method provides borazane with high purity, facilitates the recovery of ammonia and recycling of ammonia and amine, and does not require the need of organic solvent, hence economical, industrially scalable and easy to implement.    DETAILED DESCRIPTION - Obtaining borazane, comprises: providing a reactor, equipped with stirring means and thermostatically controlled at a temperature T1 to 40 degrees C; introducing anhydrous liquid ammonia into the reactor; introducing an amine borane complex with stirring into the reactor containing the anhydrous liquid ammonia, where the amine borane complex, in which the corresponding amine is soluble in the anhydrous liquid ammonia at a rate of less than 10 g in 100 g of anhydrous liquid ammonia at 20 degrees C, is introduced in an amount such that the molar ratio of anhydrous liquid ammonia/amine borane complex is greater than or equal to 5; stirring the mixture until exhaustion of all the amine borane complex; stopping the stirring and obtaining in the reactor a mixture of two phases comprising a light phase consisting essentially of an anhydrous liquid ammonia comprising borazane, and a heavy phase consisting essentially of the amine corresponding to the amino borane complex introduced; and isolating borazane and vacuum drying. The temperature T1 is greater than or equal to the melting temperature of the amine borane complex.