To provide an in-vehicle speaker system capable of easily and cost-effectively generating an optimum low frequency sound field into a vehicle even when the system employs small-sized speakers.

The in-vehicle speaker system 5 includes: first and second speaker units 15, 20 for reproducing reproduction signals outputted from a head unit 11; and a low pass filter 25 passing only a low frequency reproduction signal among the reproduction signals, and is configured by connecting the first speaker unit 15 side by side with a series circuit 27 comprising a series connection of the second speaker unit 20 and the low pass filter 25, wherein the first speaker unit 15 is located in front of a listener, and the second speaker unit 20 is located to a rear side of the listener.

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