Abstract: The invention relates to a device for injecting at least one fluid substance into an egg, of the type that comprises an injector body equipped with a protruding piercing needle for injecting said substance into the amniotic liquid of said egg and/or into the embryo contained therein, the body being connected with external means for supplying said substance, characterized in that drivable means are integrated in the body for expelling towards said needle one or more adjustable variable and parametered amounts of substance from said supply means. The invention also relates to equipment including a plurality of such devices.