Some embodiments of the present disclosure provide a wearable scanner. The wearable scanner includes: a scanner body and a wearable portion. A wearing space for a user to wear is formed between the scanner body and the wearable portion; the wearable portion includes at least one adjusting section configured for adjusting a length of the wearable portion; the adjusting section includes a plurality of hole structures that are disposed in a circumferential direction of the wearable portion, and a plurality of air-permeable grooves formed by hole walls of the hole structures in a matching manner are provided on a surface of the adjusting section facing the wearing space.