To provide high quality essential oil and water-soluble solid matter extracted from a seed of Yuzu orange (Citrus junos), and its producing method.

The essential oil obtained by freeze-drying and then steaming the seed of the Yuze orange includes, with respect to 100 pts.mass of nomilin, 60-140 pts.mass limonin, 50-130 pts.mass deacetylnomilin, and 0.5-15 pts.mass itchagenshin. The powder-like solid matter including a limonoid glycoside is obtained by extracting a residue after taking the essential oil with water. In producing, the Yuzu orange seed is crushed after freeze-drying, steaming and swelling, the essential oil component is extracted by an oil-soluble solvent, the residue not dissolving in the oil-soluble solvent is extracted by 100% ethanol, and ethanol is evaporated, and thus, the essential oil component is obtained. The residue not dissolving in 100% ethanol is extracted by water, the aqueous solution is separated and is freeze-dried, the moisture of the frozen dried product is removed by heating under reduced pressure, and the solid matter including the limonoid glycoside is produced from the seed of the Yuzu orange.