Benzo[1,2:4,5]bis(1,1,2,2-tetraisopropyldisilacyclobutene) (1) was synthesized. The X-ray crystal analysis shows that the benzene ring is deformed from the D6h symmetry. Compound 1 shows an intense 1Lb absorption band in the UV spectrum. In the emission spectrum, intense phosphorescence (Φp = 0.72) was observed at 77 K.