  The five planets discovered around the main-sequence star 55 Cnc may
represent a case of stable chaos. By using both the Frequency Map Analysis and
MEGNO we find that about 15 % of the systems that can be build from the nominal
orbital elements of the system are highly chaotic. However, in spite of the
fast diffusion rate in the phase space, the planetary system is not
destabilized over 400 Myr and close encounters between the planets are avoided.
