Device for grains dosing with air sealing, comprehending a molded packaging in a way that the product within is not in direct contact with the air outside and is totally hermetical when closed, preserving its physical and chemical characteristics, therefore it is conformed basically by five pieces being one lid (1A), a container/bottle (2A), a mobile acting element (3A), a spring (4A) and a passage element (5A)1 where said lid (1A) is connected to a mobile sealing element, conformed by the container/bottle (2A), containing a fixed passage element (5A) at its top portion which may be connected to or screwed and at its bottom portion it is conformed the inlet (6A) of the dosing element; at the bottom portion of the body (1A) is provided a guide (7A) for the accommodation of the acting element (3A).