NOVELTY - Apparatus has porous board which divides pressure container into gas space and gas-liquid contact space, evaporator, refrigerator and storage tank (12) which is connected to gas space through buffer tank. It also has piping for supplying water from tank (12) to evaporator, hydrate production units with units for supplying natural gas to gas space and gas pulling-out piping connected to mixing vessel.    USE - For manufacturing natural gas hydrate useful as hydration inclusion compound of gases such as natural gas and carbon dioxide, and water. The cold heat generated during hydrate formation is used for air conditioning of building.    ADVANTAGE - Natural gas is regenerated efficiently. The component gases for forming natural gas are mixed in desired proportions. The gas-liquid contact efficiency is improved and thereby efficiency of the hydrate formation is raised. The gas-liquid contact process is performed at uniform temperature by easy control of temperature. The hydrate which can be concentrated is stored easily.    DETAILED DESCRIPTION - Natural gas and water are contacted at predetermined pressure to form natural gas hydrate using gas hydrate manufacturing apparatus. The apparatus has a pressure container (1) which is maintained at predetermined high pressure and porous board (5) which divides the container (1) into gas space (6) and upper gas-liquid contact space (2). Two or more coil evaporators (3) which are provided into the space (2), a refrigerator (8) which supplies coolant to the evaporator and storage tank (12) which is connected to outlet of space (2) through buffer tank (9), are comprised. A water supply piping (11) which supplies raw material water (15) from the lower part of storage tank to the lower part of coil evaporator in gas-liquid contact space and two or more hydrate production units, are provided. The hydrate production units comprises serially connected units for supplying natural gas depending on the component gas contained in natural gas to gas space (6). A gas pulling-out piping (20) is connected to the storage tank of each unit and to mixing vessel (16).    An INDEPENDENT CLAIM is also included for the manufacture of natural gas hydrate. The method involves blowing natural gas into pressure container of hydrate manufacturing unit (A) at 0-2degreesC. The natural gas is contacted with raw material water at a pressure of 1.2-1.8 kg/cm2. Component gas hydrate (A) is formed. The natural gas in unit (A) of pressure container is blown into unit (B) of pressure container, and contacted with raw material water at 0-5degreesC and at pressure of 1.6-6 kg/cm2 to form component gas hydrate (B).    DESCRIPTION OF DRAWING(S) - The figure shows apparatus for manufacturing natural gas hydrate. (Drawing contains non-English text).    Container (1)    Upper gas-liquid contact space (2)    Coil evaporators (3)    Porous board (5)    Gas space (6)    Raw material gas supply piping (7)    Refrigerator (8)    Buffer tank (9)    Water supply piping (11)    Storage tank (12)    Hydrate component (13)    Raw material water (15)    Mixing vessel (16)    Unconverted gas recirculation piping (19)    Gas pulling-out piping (20)    Hydrate return piping (21)