Batocera wallacei, common name Wallace's long-horn beetle, is a species of flat-faced longhorn beetle in the subfamily Lamiinae of the family Cerambycidae.

The species name honors Alfred Russel Wallace, who discovered this longhorn beetle on the Aru Islands in Indonesia.

Batocera wallacei is a huge long-horn beetle reaching about 80–85 millimetres (3.1–3.3 in) of length in the males, while the females are smaller.

The length of the antenna may reach about 215–230 millimetres (8.5–9.1 in) in the males.

The basic colour of the body is greenish-brownish or grey with whitish dorsal patches on the elytra.