A method of transmitting a synchronization signal, a terminal, an apparatus for transmitting a synchronization signal, and a storage medium are provided. The method includes: generating a sidelink-primary synchronization signal sequence according to a formula dPSS(n)=1−2x(m) or dPSS(n)=du(n), and generating a sidelink-primary synchronization signal according to the sidelink-primary synchronization signal sequence; transmitting the sidelink-primary synchronization signal; or transmitting the sidelink-primary synchronization signal on a frequency resource different from a frequency resource occupied by an air-interface downlink-primary synchronization signal.