To keep freshness of flower in flower arrangement for a long period of time by adjusting environment, allowing plants used for the flower arrangement to appropriately perform a cycle such as respiration (carbon dioxide assimilation, transpiration and photosynthesis) in the backs of leaves, maintaining the vitality of cut flowers and preventing the cut parts from being rotten regardless of whereabouts for keeping them, in an office, a living space at home or the like.

This vase using charcoal is provided with a means for storing water inside a hollow body composed of wood charcoal, bamboo charcoal or other charcoal; and a means naturally feeding minus ions generated by air flow formed by abutting on the charcoal surface, to the vicinity of the body or the vicinity of the upper part of the main body.