A wireless communication system comprising communication stations in which transmission of data packets begins after a predetermined transmission/reception preparation process is performed between communication stations serving as a data transmission source and a data transmission destination, wherein: the communication station serving as the data transmission source is configured to store, in a header of a preparation packet to be sent for the transmission/reception preparation process, first duration information corresponding to an end time needed for transmission of a first response packet sent from the communication station serving as the data transmission destination in response to the preparation packet and second duration information corresponding to an end time needed for transmission of a second response packet sent from the communication station serving as the data transmission destination in response to a data packet sent from the communication station serving as the data transmission source after the transmission/reception preparation process, and a neighboring station having received the preparation packet sent from the communication station serving as the data transmission source is configured to set a first network allocation vector relating to a scheduled reception completion time of the first response packet on the basis of the first duration information and a second network allocation vector relating to a scheduled reception completion time of the second response packet on the basis of the second duration information and to ignore the second network allocation vector in a case where no packet transmission is detected within a period for which the first network allocation vector has been set or within a predetermined time after the scheduled reception completion time of the first response packet. the communication station serving as the data transmission source is configured to store, in a header of a preparation packet to be sent for the transmission/reception preparation process, first duration information corresponding to an end time needed for transmission of a first response packet sent from the communication station serving as the data transmission destination in response to the preparation packet and second duration information corresponding to an end time needed for transmission of a second response packet sent from the communication station serving as the data transmission destination in response to a data packet sent from the communication station serving as the data transmission source after the transmission/reception preparation process, and a neighboring station having received the preparation packet sent from the communication station serving as the data transmission source is configured to set a first network allocation vector relating to a scheduled reception completion time of the first response packet on the basis of the first duration information and a second network allocation vector relating to a scheduled reception completion time of the second response packet on the basis of the second duration information and to ignore the second network allocation vector in a case where no packet transmission is detected within a period for which the first network allocation vector has been set or within a predetermined time after the scheduled reception completion time of the first response packet.