Abstract: In a process for producing a formed article of aromatic polyamide-imide resin by compression-molding at the temperature lower than the melting temperature of the resin, the improvement which comprises subjecting the resin, prior to the molding, to heat treatment in an oxygen-containing gas under conditions satisfying the following equationlogt.gtoreq.a.sub.1 +a.sub.2 T+a.sub.3 T.sup.2 +a.sub.4 T.sup.3,wherein a.sub.1 =2.5841, a.sub.2 =-8.4926.times.10.sup.-3, a.sub.3 =6.9984.times.10.sup.-6, and a.sub.4 =-2.0449.times.10.sup.-8 ; t and T represent the heat-treatment time in hour and the heat-treatment temperature in .degree.C., respectively; and 200.degree. C..ltoreq.T.ltoreq.400.degree.C.