A height measurement device, detachably disposed on an article, includes a body and a measurement unit. The body includes a clamping member, a height indicator, and a pivot member. The clamping member has a first joint portion and a clamping slit, wherein the clamping slit is capable of clamping the article. The height indicator has a first pivot portion. The pivot member has an adjacent portion and a second joint portion, and is pivotally jointed the height indicator to the clamping member through the first pivot portion, whereas the pivot member is moved to allow the second joint portion joint to the first joint portion, the adjacent portion abuts the height indicator onto the clamping member so as to fix the height indicator at a measurement position. The measurement unit disposed on the body is for use in measuring a height of the measurement position.
