GLAY（中文译名：灰色），日本著名的4人组摇滚乐团。于1988年组成，自1994年正式出道后创作出大量受欢迎的流行歌曲，并对1990年代日本摇滚音乐有所影响。

出道至今缔造出8张百万单曲：口唇、HOWEVER、诱惑、SOUL LOVE、BE WITH YOU、Winter,again、不是这里，要往哪里、迷惑/SPECIAL THANKS（日本唱片业协会纪录认定），5张百万专辑：BELOVED、REVIEW-BEST OF GLAY、pure soul、HEAVY GAUGE、DRIVE-GLAY complete BEST。在日本唱片史上荣获最多百万单曲的纪录中，GLAY位居第4名（ORICON纪录认定，不包含『口唇』、『不是这里，要往哪里』）。

Glay is a Japanese rock band, formed in Hakodate in 1988. Glay primarily composes songs in the rock and pop genres, but they have also arranged songs using elements from a wide variety of genres, including punk, electronic, R&B, folk, reggae, gospel, and ska. Originally a visual kei band, the group slowly shifted to less dramatic attire through the years. As of 2008, Glay had sold an estimated 51 million records; 28 million singles and 23 million albums, making them one of the top ten best-selling artists of all time in Japan.