A brake mechanism for a baby stroller, having a plurality of wheels and a pair of rotatable push arms capable of being moved either forward or rearward. The brake mechanism comprises a connecting assembly and an actuator; and has a braking block for operatively stopping the baby stroller. The connecting assembly has a pulling slider for operatively associating with the braking block of the brake mechanism, and the actuator is operatively secured to the push arm and associated with the connecting assembly, so as to indirectly drive the brake mechanism. This allows a user to manipulate the actuator to stop the stroller from either in front of or behind the stroller.