A unit for transferring and up-ending at least one sealed package containing a pourable food product and having a first axis, comprising: at least one push member which cooperates with package to feed it along a first path from an in-feed station to an out-feed station; the path extending about a second axis; the unit further comprising a guide cooperating with a first side of package along first path to up-end it from an in-feed position, in which it is positioned with first axis oriented in a first direction, to an out-feed position, in which it is positioned with first axis oriented in a second direction crosswise to first direction; and an anti-rotating mechanism cooperating with package along path to prevent package from rotating about first axis; an anti-rotating mechanism comprising a pressure element rotatable about second axis and adapted to cooperate, in use, with package.