Sure, and in several theories of gravitation where there are gravitons as an uncharged massless spin-2 gauge boson (General Relativity isn&#x27;t one of these; it doesn&#x27;t have any gravitons at all, although the non-quantized classical gravitational waves have spin-2 symmetry) then gravitons are their own anti-particles, just as photons (uncharged massless spin-1 gauge bosons) are their own anti-particles in the Standard Model.<p>(i.e., anti-gravitons and gravitons are the same thing, just as anti-photons and photons are the same thing).<p>There are a variety of other theories of gravitation with gravitons, but as far as I know, there are none in which gravitons are not their own antiparticles.   (There may be such theories available in universes with a very different cosmological constant or with different numbers of dimensions than the one we are in).