  Using the short-cadence data (1-min interval) of the Kepler space telescope,
we conducted a statistical analysis for the characteristic time of stellar
flares on Sun-like stars (SLS). Akin to solar flares, stellar flares show rise
and decay light-curve profiles, which reflect the two distinct phases (rise
phase and decay phase) of the flare process. We derived characteristic times of
the two phases for the stellar flares of SLS, resulting in a median rise time
of about 5.9 min and a median decay time of 22.6 min. It is found that both the
rise time and the decay time of the stellar flares follow a lognormal
distribution. The peak positions of the lognormal distributions for flare rise
time and decay time are 3.5 min and 14.8 min, respectively. These time values
for stellar flares are similar to the time-scale of solar flares, which
supports the idea that stellar flares and solar flares have the same physical
mechanism. The statistical results obtained in this work for SLS can be a
benchmark of flare characteristic times when comparing with other types of
stars.
