Abstract: Absorption maxima of intact and non-intact phycobilisomes are located at 618nm. The room temperature fluorescence emission maximum of intact phycobilisomes is located at more .than 670nm; that of non-intact phycobilisomes is less than 670nm. There is only one 684 nm band in 77 K fluorescence emission spectrum of intact phycobilisomes; two or three bands in that of non-intact phycobilisomes, they are located at 684 nm, 666 nm and 648 nm,characteristics of allophycocyanin-B, allophycocyanin and C-phy-cyanin respectively.