Amino-terminated carbosilane dendrimer-platinum complex was synthesized and their crystal and morphology were investigated with transmission electronic microscopy (TEM) and scanning electronic microscopy (SEM). Mono-dispersed complex molecule in DMSO solvent showed a size of about 3 nm. Microcrystal flake of the complex was found with a lattice of hexagonal symmetry. Furthermore, the aggregate of such complex appeared to be spherical particles and fractal dendritic patterns.