There is provided a body composition meter having a function of determining the body compositions of children by which a subject can conveniently acquire highly reliable data about determination of a proper grade for the body composition of the child. In the body composition meter, child body composition determining means determines a proper grade for a value associated with the body composition of a child which corresponds to the value associated with the body composition of the child acquired by body composition acquiring means and an indicator indicating the level of the growth of the child acquired by growth indicator acquiring means by referring to a body composition determination standard (which shows proper grades for values associated with the body composition of children as a plurality of ranges according to an indicator indicating the level of the growth of children based on an obesity determination standard showing proper grades for values associated with the obesity of children as a plurality of ranges) stored in child body composition determination standard storing means.