A light generating block comprising a plurality of light generating units, each of the plurality of light generating units includes: a transparent vessel that is elongated and contains a liquid; and a light-emitting/bubble producing unit attached to a base portion of the vessel, wherein the plurality of light generating units are arranged so that vessels of the plurality of light generating units construct a wall, and wherein the light-emitting/bubble producing unit includes a plurality of light-emitting elements and a plurality of nozzles for discharging a gas; and wherein, by the light-emitting/bubble producing unit fitted on each of the vessels, bubbles are introduced to each of the vessels and bubbles rising in each of the vessels are illuminated, characterized in, that the light-emitting/bubble producing unit includes: a convex portion that is fitted into an opening of a center of a transparent base plate of each of the vessels from below; and a flange portion that is adapted to seal the opening of the base plate in a circumference of the convex portion, the flange portion being tightly attached to a lower surface of the base plate with packing in between; wherein the plurality of light-emitting elements are disposed around a circumference of the flange portion so as to face the base plate and disposed around inner surfaces of side walls (12a, 12b, 12c) of each of the vessels when the convex portion is fitted into the opening of the base plate; and the plurality of nozzles for discharging a gas are provided on an upper end of the convex portion so that the light-emitting/bubble producing unit is assembled by merely detachably inserting the convex portion into the base plate from below and are disposed on an inside of the plurality of light-emitting elements, wherein, by light-emitting /bubble producing unit, bubbles rising in each of the vessels are adapted to be illuminated on a vessel-by-vessel basis. a transparent vessel that is elongated and contains a liquid; and a light-emitting/bubble producing unit attached to a base portion of the vessel, wherein the plurality of light generating units are arranged so that vessels of the plurality of light generating units construct a wall, and wherein the light-emitting/bubble producing unit includes a plurality of light-emitting elements and a plurality of nozzles for discharging a gas; and wherein, by the light-emitting/bubble producing unit fitted on each of the vessels, bubbles are introduced to each of the vessels and bubbles rising in each of the vessels are illuminated, characterized in, that the light-emitting/bubble producing unit includes: a convex portion that is fitted into an opening of a center of a transparent base plate of each of the vessels from below; and a flange portion that is adapted to seal the opening of the base plate in a circumference of the convex portion, the flange portion being tightly attached to a lower surface of the base plate with packing in between; a convex portion that is fitted into an opening of a center of a transparent base plate of each of the vessels from below; and a flange portion that is adapted to seal the opening of the base plate in a circumference of the convex portion, the flange portion being tightly attached to a lower surface of the base plate with packing in between; wherein the plurality of light-emitting elements are disposed around a circumference of the flange portion so as to face the base plate and disposed around inner surfaces of side walls (12a, 12b, 12c) of each of the vessels when the convex portion is fitted into the opening of the base plate; and the plurality of nozzles for discharging a gas are provided on an upper end of the convex portion so that the light-emitting/bubble producing unit is assembled by merely detachably inserting the convex portion into the base plate from below and are disposed on an inside of the plurality of light-emitting elements, wherein, by light-emitting /bubble producing unit, bubbles rising in each of the vessels are adapted to be illuminated on a vessel-by-vessel basis.