대국남아(大國男兒)는 대한민국의 남성 5인조 그룹이다. 대국남아 멤버는 미카(리더), 가람, 현민, 인준, Jay로 5인조로 이루어져 있다.

2010년 오유 스타 홍보대사

2011년 제20회 하이원 서울가요대상 신인상

The Boss (대국남아, often referred to as DGNA or, incorrectly, D-NA) is a South Korean boy band with five members, formed under Open World Entertainment in 2010. In South Korea they are known as Dae Guk Nam Ah, literally meaning The Boys of Super Space, which is how their English name of 'The Boss' was formed. In Japan, they are known as Daikoku Danji (大国男児).

The group consists of Mika, Karam, Hyunmin, Injun and Jay. All five members of The Boss were formerly members of Xing Entertainment and members of the generation band Xing with different stage names. After being officially announced on January 28, 2010, The Boss debuted on March 4, 2010 with their song "Admiring Boy" on Mnet M!Countdown. On June 18, 2010, they performed a comeback on KBS2's Music Bank with "Biteul, Biteul (비틀비틀)", also known as "Stumble Stumble" after releasing the respective music video. They also went on to promote another song, "Nobody...Anybody (아무도...그누구도)" in August 2010, but without a music video release.

Since September 2010, The Boss spent a year promoting their Japanese singles, "Love Power", "Love Bingo", and "Love Parade" in April 2011, June 2011 and September 2011 respectively as part of their "Love Series" before returning to Korea to promote "Lady" in late October 2011. They have been commonly known as 'K-Pop re-exported from Japan' as they have used a ‘Japan-First, Korea-Later’ strategy in their performances.

大国男儿（朝鲜语：대국남아／大國男兒 Dae Guk Nam Ah，英语：The Boss），简称DGNA，是由Open World娱乐于2010年推出的五人男子音乐组合，五人出道前原为XING的成员。成员包括Mika、Karam、HyunMin、InJun及Jay，平均年龄约20岁。大国男儿于2010年3月在韩国以数码单曲“憧憬少年”正式出道，大国男儿的英文名称The Boss同时代表了“The Boys Of Super Space”。大国男儿的歌迷名称为Master，官方应援色为珍珠陶土色。