  We study theoretically the spontaneous edge current in a small chiral
superconductor with surface roughness. We obtained self-consistent solutions of
the pair potential and the vector potential by solving the quasiclassical
Eilenberger equation and the Maxwell equation simultaneously. We then employed
them to calculate numerically the spatial distribution of the chiral edge
current in a small superconductor. The characteristic behavior of the
spontaneous edge current depends strongly on the symmetries of the order
parameters such as chiral $p$-, chiral $d$- and chiral $f$-wave pairing. The
edge current is robust under the surface roughness in the chiral $p$- and
chiral $d$-wave superconductors. In the chiral $d$-wave case, the surface
roughness tends to flip the direction of the chiral current. On the other hand,
the edge current in a chiral $f$-wave superconductor is fragile when there is
surface roughness. We also discuss the temperature dependence of a spontaneous
magnetization, which is a measurable value in standard experiments.
