noun
vacuum cleaner bag; dust bag
Refers to the disposable or reusable bag inside a vacuum cleaner that collects dust and debris.
掃除機の集塵袋がいっぱいになったので交換した。
I replaced the vacuum cleaner bag because it was full.
掃除機 is the vacuum cleaner itself, while 集塵袋 is the dust collection bag inside it.
Compound of 集塵 (しゅうじん, 'dust collection') + 袋 (ふくろ, 'bag').