The alpine accentor (Prunella collaris) is a small passerine bird in the family Prunellidae.
This is a robin-sized bird at 15–17.5 cm (5.9–6.9 in) in length, slightly larger than its relative, the dunnock. It has a streaked brown back, somewhat resembling a house sparrow, but adults have a grey head and red-brown spotting on the underparts. It has an insectivore's fine pointed bill.
Sexes are similar, although the male may be contrasted in appearance. Young birds have browner heads and underparts.