Disclosed are a method and an apparatus for scanning in a wireless Local Area Network (LAN). A method for scanning by a station (STA) comprises the steps of: the STA generating a Medium Access Control (MAC) layer management entity (MLME)-SCAN.request primitive comprising information for a basic service set identifier (BSSID) and a service set identifier (SSID); the STA generating a probe request frame comprising wildcard BSSID and SSID; the STA multi-casting the probe request frame to a first Access Point (AP) forming an extended service set (ESS) network using a particular SSID; and the STA receiving a probe response frame broadcast from the first AP as a response to the probe request frame.