Abstract: An adjustable spanner includes a handle having a mounting end having a pressure edge and a thinned portion, a movable piece having a multi-angular surface capable of cooperating with the pressure edge to grip therebetween a tubular article and an engaging portion which by means of a pivoting medium is slidably and pivotably mounted on the thinned portion, and a positioning elastic piece having a first end fixed to the handle and a second opposite end engaging with the movable piece.