The invention provides a negative electrode material for lithium ion secondary battery, including a composite particle of a first particle containing a carbonic substance A and a second particle containing silicon, which are combined with a carbonic substance B, wherein, when a cross-section of the composite particle is observed with respect to: the content of silicon atom in a core region in a circle having a center thereof on the midpoint of the major axis, which constitutes the maximum length, and having a radius of ⅛ of the length of the minor axis orthogonally intersecting the major axis at the midpoint thereof, and the content thereof in a rim region extending from the circumference to a depth of ⅛ of the length of the minor axis, the ratio of the content in the rim region to that in the core region is 2 or higher.