The present invention relates to a porous silicon composite, a method of preparing the same, a carbon composite using the same, and an electrode, a lithium battery, and a device each including the same. A porous silicon composite cluster structure includes: a porous silicon composite cluster comprising a porous silicon composite secondary particle and a second carbon flake on at least one surfaceof the porous silicon composite secondary particle; and a carbonaceous layer on the porous silicon composite cluster, the carbonaceous layer comprising amorphous carbon, wherein the porous silicon composite secondary particle comprises an aggregate of two or more silicon primary particles, the two or more silicon primary particles comprise silicon, a silicon suboxide of the formula SiOx , wherein0