A height measurement device i.e. stadiometer, is detachably disposed on an article and includes a body and a measurement unit. The body includes a clamping member 10, a stopper 20 and a pivot member 30. The clamping member has a first joint portion 104 and a clamping slit 103, wherein the clamping slit is capable of clamping the article. The stopper has a first pivot portion. The pivot member has an adjacent portion 301 and a second joint portion 303, and pivotally joints the stopper to the clamping member through the first pivot portion, whereas the pivot member is moved to allow the second joint portion to joint to the first joint portion, the adjacent portion abuts the stopper onto the clamping member so as to fix the stopper at a measurement position. The measurement unit disposed on the body is for use in measuring a height of the measurement position. The device has a low volume and is easily portable. It can be used on an already existing article such as a door or column. The measurement unit can be a tape measure or laser for example.
