To obtain an epoxy coating material composition which prolongs the time interval of recoatability of an antifouling coating material and a topcoating material of the same type or the different type and has high adhesion.

The two-pack epoxy coating material composition comprises (A) an epoxy resin and (B) a urethaneamine compound to be represented by the formula (wherein R is a 1-20C linear or branched alkylene group, a 3-20C cycloalkylene group or a 3-20C arylene group) with a content of the above urethaneamine compound (B) in the solid content of the epoxy coating material composition of ≥20 wt.%.