  We study the Raman spectra of spin-triplet superconductors in Sr$_2$RuO$_4$.
The p-wave and f-wave symmetries are considered. We show that there is the
clapping mode with frequency of $\sqrt{2} \Delta(T)$ and $1.02 \Delta(T)$ for
p-wave and f-wave superconductors, respectively. This mode is visible as a huge
resonance in the B1g and B2g modes of Raman spectra. We discuss the details of
the Raman spectra in these superconducting states.
