开罐器，是开罐头的工具。

最初的罐头都是用小刀或凿刀来开启。1858年，美国人Ezra Warner申请了一个开罐器的专利。1870年William Lyman发明了有轮子的开罐器。1925年Star Can公司发明了有齿轮轮子的开罐器。1931年电动开罐器出现。

维基共享资源中相关的多媒体资源：开罐器

A can opener (in North American English and Australian English) or tin opener (in British and Commonwealth English) is a device used to open tin cans (metal cans). Although preservation of food using tin cans had been practiced since at least 1772 in the Netherlands, the first can openers were not patented until 1855 in England and 1858 in the United States. These early openers were basically variations of a knife, though the 1855 design continues to be produced. The first can opener consisting of the now familiar sharp rotating cutting wheel was invented in 1870 but was considered too difficult to operate for the ordinary consumer. A breakthrough design came in 1925 when a second, serrated wheel was added to hold the cutting wheel on the ring of the can. This easy to use design has become one of the most popular can opener models.