A metal compound obtained by a process comprising the step of contacting, in a
specific ratio, a compound represented by the formula BiL1r,
a compound represented by the formula R1s-1TH, and a compound
represented by the formula R23-nJ(OH)n; a catalyst
component for addition polymerization comprising the metal compound; a catalyst
for addition polymerization using the catalyst component; and a process for producing
an addition polymer using the catalyst.