An FBMC signal transmitting method and receiving method, a transmitter, and a receiver are provided. The transmitting method includes: generating offset quadrature amplitude modulation OQAM symbols included on at least two subbands; mapping an OQAM symbol on each subband onto a respective subcarrier to obtain a frequency-domain signal, where a first frequency interval exists between adjacent subcarriers in a same subband, a second frequency interval exists between adjacent subcarriers that belong to two adjacent subbands, the second frequency interval is a sum of the first frequency interval and a guard band interval, and the guard band interval is a fractional multiple of the first frequency interval; generating an FBMC signal out of the frequency-domain signal; and transmitting the FBMC signal to a receiver.