The present invention addresses the problem of providing a sealant composition for a nonaqueous electrolyte cell in which the application position and uniformity of applied film thickness of the sealant can be visually confirmed even when applied in a thin film, and having excellent durability in relation to various electrolytic solutions used in the cell. A sealant composition for a nonaqueous electrolyte cell, characterized in containing (A) an elastomer and (B) a cobalt blue colorant, component (B) having a content of 0.1-20 mass parts with respect to 100 mass parts of component (A).