About 0.001 to 5 parts by weight of a hindered phenol-series compound,
about 0.01 to 5 parts by weight of a weather (light)-resistant stabilizer,
and about 0.001 to 10 parts by weight of a spiro-compound having a
triazine ring are added to 100 parts by weight of a polyacetal resin. The
spiro-compound may be a compound represented by the following formula (1).
The polyacetal resin composition may further comprise a coloring agent, a
processing stabilizer, a heat stabilizer, and others.
##STR1##
wherein R.sup.1 and R.sup.2 are the same or different, each representing an
alkylene group, an arylene group, or an aralkylene group.