angle measuring device 2 differs from that of the measured line LX connecting the first position PL and the second position PR and the predetermined reference plane to detect the angle of the angle. Angle measuring device 2 includes a housing 10, a first pointing mechanism 30L to refer to the first position PL, and a second pointing mechanism 30R to refer to the second position PR, the 1-2 refers mechanism 30L, 30R comprising of a moving mechanism 60L, 60R to freely move at least one, the moving mechanism 60L, the first 1 to 2 points mechanism 30L by 60R, and Kaidoko angle scale 72 which indicates at least one of the amount of movement of the 30R, the. Moving mechanism 60L, 60R, as a state in which a line connecting the first point to mechanisms 30L and the second pointing mechanism 30R is parallel to the condition or measurement reference plane, comprising a measurement reference plane, the first pointing mechanism 30L like to move.角度測定機2は、第1位置PL及び第2位置PRを結ぶ被測定線LXと所定の基準面とがなす角の角度を検知するものである。角度測定機2は、筐体10と、第1位置PLを指すための第1指し機構30Lと、第2位置PRを指すための第2指し機構30Rと、第1~2指し機構30L、30Rの少なくとも一方を移動自在にする移動機構60L、60Rと、移動機構60L,60Rによる第1~2指し機構30L,30Rとの少なくとも一方の移動量を示す回動子角度目盛72と、を備える。移動機構60L、60Rは、第1指し機構30Lと第2指し機構30Rとを結ぶ線分が測定基準面を含む状態、または測定基準面と平行となる状態となるように、第1指し機構30L等を移動する。
