The Siberian Accentor, Prunella montanella, is a small passerine bird which breeds in northern Siberia on both sides of the Urals. It is migratory, wintering in southeast Asia. It is a rare vagrant in western Europe.

This is a Dunnock-sized bird, 13-14.5 cm in length. It has a streaked reddish-brown back, but adults have a brownish-black crown, dark cheeks, and a buff supercilium. The entire underside is yellowish rusty-buff. Like other accentors, this species has an insectivore's fine pointed bill.

The call is a fine ti-ti-ti, and the song is similar to the Dunnock's pleasant twittering.