B-Daman (ビーダマン, Bīdaman) is a marble shooting toy franchise produced in Japan by Takara. It was originally based on the Bomberman series, but later expanded into other franchises and its own original designs.

The toy's design is a humanoid figure, with a round cavity in its abdomen that houses a specially made marble (though other marbles of the same size may be used). The marble is launched by pressing a spring-loaded trigger on the back of the figure. Different attachments and accessories can be used to change various traits of the B-Daman, such as its accuracy, power, balance, control, and firing rate. They are customizable, and each have their own special gimmick.

In the Japanese language Battle B-Daman toys, the marbles are referred to as "B-Dama". In all cases they are simply called "marbles" (Japanese: ビー玉; bīdama, hence the name "B-Daman") in Japan. In the English language B-Daman toylines and media, the marbles were originally called 'B-DaBalls", but was later changed to "B-DaMarbles".^{[citation needed]}

In 2020, a spiritual successor to the B-Daman brand was launched with Cap Revolution Bottleman. This series shares the majority of its themes and design language with B-Daman, but uses plastic screw caps instead of marbles. Some of the toys included in the series are directly based on B-Daman figures and characters, with appropriately updated names.

As the toys are marble launchers at their core, various structured games may be played with them. Hasbro's Battle B-Daman Tournament Sets include rules for the following ten games:

Many iterations of the toy designs have been released over the years.