An LC optical fiber cable adapter assembly comprising a main adapter that is adapted for interconnecting at least one LC optical fiber cable and a terminal equipment, said main adapter comprising: a main body having a mounting end that is adapted to face the terminal equipment and a coupling end that is opposite to said mounting end and that is adapted to be coupled to the LC optical fiber cable, said main body including a base wall, a first connecting wall and a second connecting wall that extend in the same direction respectively from opposite lateral edges of said base wall, said first connecting wall having a first front wall segment and a first rear wall segment, said second connecting wall having a second front wall segment that corresponds in position to said first front wall segment of said first connecting wall, and a second rear wall segment that corresponds in position to said first rear wall segment of said first connecting wall, said mounting end of said main body being formed on said base wall and said first and second rear wall segments (211, 221), said coupling end of said main body being formed on said base wall and said first and second front wall segments (212, 222), and a first closure wall that is connected to said first connecting wall and said second connecting wall, and that is spaced apart from said base wall; and a connecting mechanism including a first connecting unit that is provided on an outer surface of said first front wall segment, and two second connecting units, each of which is provided on an outer surface of a respective one of said second front and rear wall segments (222, 221) of said second connecting wall, and has a contour the same with that of said first connecting unit; said LC optical fiber cable adapter assembly characterized in that the said connecting mechanism further includes a first engaging member provided on an outer surface of said first closure wall, and a first engaging component provided on an outer surface of said base wall and having a contour that matches that of said first engaging member. a main body having a mounting end that is adapted to face the terminal equipment and a coupling end that is opposite to said mounting end and that is adapted to be coupled to the LC optical fiber cable, said main body including a base wall, a first connecting wall and a second connecting wall that extend in the same direction respectively from opposite lateral edges of said base wall, said first connecting wall having a first front wall segment and a first rear wall segment, said second connecting wall having a second front wall segment that corresponds in position to said first front wall segment of said first connecting wall, and a second rear wall segment that corresponds in position to said first rear wall segment of said first connecting wall, said mounting end of said main body being formed on said base wall and said first and second rear wall segments (211, 221), said coupling end of said main body being formed on said base wall and said first and second front wall segments (212, 222), and a first closure wall that is connected to said first connecting wall and said second connecting wall, and that is spaced apart from said base wall; and a base wall, a first connecting wall and a second connecting wall that extend in the same direction respectively from opposite lateral edges of said base wall, said first connecting wall having a first front wall segment and a first rear wall segment, said second connecting wall having a second front wall segment that corresponds in position to said first front wall segment of said first connecting wall, and a second rear wall segment that corresponds in position to said first rear wall segment of said first connecting wall, said mounting end of said main body being formed on said base wall and said first and second rear wall segments (211, 221), said coupling end of said main body being formed on said base wall and said first and second front wall segments (212, 222), and a first closure wall that is connected to said first connecting wall and said second connecting wall, and that is spaced apart from said base wall; and a connecting mechanism including a first connecting unit that is provided on an outer surface of said first front wall segment, and two second connecting units, each of which is provided on an outer surface of a respective one of said second front and rear wall segments (222, 221) of said second connecting wall, and has a contour the same with that of said first connecting unit; said LC optical fiber cable adapter assembly characterized in that the said connecting mechanism further includes a first engaging member provided on an outer surface of said first closure wall, and a first engaging component provided on an outer surface of said base wall and having a contour that matches that of said first engaging member.