A party popper contains: a body which includes two first openings defined on two ends of the body respectively. A flexible push portion is mounted on an end of the body, and a launchable cylinder is slidably accommodated in the body. The body includes a surrounding rib fitted thereon, and the flexible push portion is configured to drive the launchable cylinder to slide until the launchable cylinder is stopped by the surrounding rib. Multiple launchable objects are launched from the launchable cylinder inertially, thus launching the multiple launchable objects safely.