The present invention relates to a bottom wear having at least a waist-encircling section (2), wherein the waist-encircling section (2) at least has a first hole (3) and a second hole (4). The present invention provides a bottom wear assuring easy adjustment of the waist fastening position which varies from person to person； practicability saving time and labor in maintenance such as laundering； and easy adjustment of an abdominal pressure enabling a waist portion to be tightened and loosened easily.
