A network interface apparatus for wireless Ethernet is provided. The network interface apparatus includes: a Network Interface Card (NIC) control unit for converting a gigabit wired Ethernet signal into a Peripheral Component Interconnect express (PCIe) signal; a wireless network processing unit for converting the PCIe signal received from the NIC control unit into an analog signal; and an RF transmitting/receiving unit for converting the analog signal inputted from the wireless network processing unit into an RF signal of a 60 GHz frequency band to transmit the converted RF signal into a wireless terminal device.