To provide a deodorizer capable of reliably adsorbing an offensive odor such as ammonia gas. Also, to provide a deodorizer which can easily be processed into fibers, a resin molded article, or the like, and a deodorizing processed article which uses the same. This deodorizer is characterized by comprising an amorphous aluminum silicate represented by formula (1). (1): xM2O.Al2O3.ySiO2.nH2O (In the formula, M represents an alkali metal element, x represents a number of 0.1 to 0.5, y represents a number of 5 to 15, and n represents a number of 0.3 to 15).本發明之消臭劑係特徵為由下述式(1)表示的非晶質矽酸鋁所構成。一次粒徑較佳為0.01~0.2μm。xM2O．Al2O3．ySiO2．nH2O (1)(式中，M係鹼金屬元素，x係0.1~0.5之數，y係5~15之數，n係0.3~15之數)。
