A lacing system includes an article, a guiding portion, a lace and a fastening mechanism. The lacing zone is located between the first side and the second side. The guiding portion is positioned at the article and includes a first guide and a second guide. The first guide is positioned on the first side and located in the lacing zone. The second guide is positioned on the second side and located in the lacing zone. The lace is guided by the guiding portion and extended in a zig-zag pattern throughout the lacing zone. The fastening mechanism is positioned at the article to loosen or fasten the lace, which includes a housing and a reel member. The housing includes a connecting hole and a passage. The reel member is coupled to the housing to loosen or fasten the lace and is rotated along a first direction relating to the housing.