Abstract: An adsorbent (2) is sandwiched by two films (4) from upper and lower directions; the two films (4) are bonded to upper and lower surfaces of the adsorbent (2). A skirt portion (4A) extending in a lateral direction of the adsorbent (2) is formed in an outer periphery of each of the films (4) and dispersing openings (8) are formed between the skirt portions (4A). Then, a freshness-keeping liquid impregnated in the adsorbent (2) is gradually dispersed outside from each side portion (2A) of the adsorbent (2) through the dispersing opening (8), whereby the adsorbent (2) in the freshness-keeping device (1) is prevented from contacting directly food and the freshness of the food can be kept stably in a long period of time.