NOVELTY - The hydrogen generator comprises: a reaction chamber; an organic solvent supply unit; and an ammonia borane pellet supply unit. An ammonia borane pellet from the ammonia borane pellet supply unit and the organic solvent from the organic solvent supply unit are reacted to perform hydrogenation in the chamber. A hydrogen inclusion gas discharge portion is provided with the organic solvent and connected to the chamber. A reaction product exhausting part is connected to the chamber. The organic solvent is delivered from an organic solvent storage connected to the organic solvent supply unit.    USE - The hydrogen generator is useful in a fuel cell device (claimed) that is useful in a vehicle and an electronic device.    ADVANTAGE - The hydrogen generator can generate hydrogen with high yield and without using a separate catalyst.    DETAILED DESCRIPTION - The hydrogen generator comprises: a reaction chamber; an organic solvent supply unit; and an ammonia borane pellet supply unit. An ammonia borane pellet from the ammonia borane pellet supply unit and the organic solvent from the organic solvent supply unit are reacted to perform hydrogenation in the reaction chamber. A hydrogen inclusion gas discharge portion is provided with the organic solvent and connected to the reaction chamber. A reaction product exhausting part is connected to the reaction chamber. The organic solvent is delivered from an organic solvent storage connected to the organic solvent supply unit. The ammonia borane pellet is delivered from an ammonia borane pellet storage connected the ammonia borane pellet supply unit. A hydrogen supply part supplies a part of the hydrogen ejected from the hydrogen inclusion gas discharge portion to the ammonia borane pellet storage. The ammonia borane pellet supply unit includes an opening and closing control equipment that is opened when the ammonia borane pellet is supplied to the reaction chamber, and closed when the reaction occurs in the reaction chamber. The reaction chamber includes an organic solvent heater and a cooling apparatus. A pressure sensor and a temperature sensor sense pressure and temperature within the reaction chamber, respectively. A refining part is connected to the hydrogen inclusion gas discharge portion. The refining part is a filter consisting of a chemical filter and a physical filter. The organic solvent storage is positioned between the hydrogen inclusion gas discharge portion and the refining part. The organic solvent storage is connected to the refining part. A gas cooling device is included between the hydrogen inclusion gas discharge portion and the organic solvent storage, and performs the heat exchange between the gas ejected from the hydrogen inclusion gas discharge portion and the organic solvent supplied from the organic solvent storage. An impurity is trapped from gas ejected from the hydrogen inclusion gas discharge portion. The cooling apparatus is provided for condensation of the impurity. The ammonia borane pellet is rectangle in shape. An inner temperature of the reaction chamber is 100-160 degrees C. An INDEPENDENT CLAIM is included for a method for generating hydrogen.