Technologies are generally described for measuring skin moisture using a skin moisture measuring device. Example devices and systems described herein may include one or more of an elongated enclosure, an inlet, a moisture sensor, and/or a cooling unit. The inlet may be arranged at a first end of the elongated enclosure, and may be configured to be in contact with skin and receive moisture transpiring from the skin. The moisture sensor may be arranged between the first end and a second end inside the elongated enclosure, and configured to detect an amount of the moisture. Further, the cooling unit may be arranged at the second end of the elongated enclosure, and configured to cool and condense the moisture. The cooling unit may be controlled to maintain a substantially constant temperature difference between a first temperature proximate the moisture sensor and a second temperature proximate the cooling unit.