Country Musume Daizenshuu ① (カントリー娘。大全集①; The Complete Works of Country Musume 1) is Country Musume's first album. It was released on December 12, 2001. It contains all of the songs from their first six singles except "Morning Gyuunyuu", as well as three new songs. The album entered the Oricon charts at #8 and ended up as #20 for the week rank. It sold a total of 24.850 copies.
The first press of the album came with a limited edition card with a 2002 calendar on the reverse side with Rinne's and Asami's birthdays highlighted.
Eight months before the release of this album, the group’s original producer, Tanaka Yoshitake, had given his position to Tsunku, who made Ishikawa Rika a temporary member and changed the sound of the group from country-pop to dance-pop. Future releases would be credited to Country Musume ni Ishikawa Rika.