Disclosed are a method and an apparatus for scanning in a wireless LAN. The method may comprise the following steps: an STA determining identifier information of an AP to be included in a probe request frame as a wildcard SSID and a wildcard BSSID, based on a first MLME; the STA receiving from the AP a frame including information on the BSSID of the AP and the SSID of the AP before a probe delay time expires; the STA determining wither the AP is a target AP based on the BSSID and the SSID; the STA redetermining the identifier information of the AP to be included in the probe request frame based on the BSSID and the SSID, when the AP is the target AP; and the STA unicasting a probe request frame that is re-determined based on the BSSID and the SSID.