An open chestnut structure, comprising: a fruit； a hard shell disposed on a periphery of the fruit, wherein: the outer periphery of the hard shell is provided with at least one cut； at least one cut loop of the outer periphery of the hard shell is disposed at The outer periphery of the hard shell or at least one side, and the shape of the cut of the hard shell is in a shape of a letter or a cross or a cross shape or an elliptical shape. With this structure, it is effective to improve its use, save time and effort, health, safety and maintain the original taste.一種開口栗子結構，該栗子，包括：一果實；一設於果實外圍之硬殼，其特徵在於：該硬殼外圍設有至少一割痕；該硬殼外圍之至少一割痕係環設於硬殼外圍或至少一側，又該硬殼之割痕形狀係呈一字形狀或十字形狀或交叉形狀或橢圓形狀。藉此結構，有效提升其使用方便、省時省力、衛生、安全與保持原有口感。
