A pet stroller includes a pet carrier having a base and an engaging portion formed on the base and a stroller body having two landing tubes configured to support the pet carrier and two holding portions connected with the landing tubes. The engaging portion of the pet carrier being selectively engaging and disengaging with the holding portions of the stroller body to enable the pet carrier to be detachably attached to the stroller body. In addition, the pet stroller further includes a controlling assembly for removing the pet carrier from the stroller easily and quickly and fastening the soleplate on the holding portions.