A block studying tool for an infant, includes: a block body having a hexahedral shape, a lower portion of which is opened; and a plurality of unit assembling portions disposed to protrude from an upper portion of the block body upward and disposed to be spaced a predetermined distance apart from each other, wherein a divider is disposed at an inside of the lower portion of the block body and forms an assembling space in which the plurality of unit assembling portions of the adjacent block body are to be assembled according to positions.