The present invention relates to an intake manifold for a liquefied petroleum gas (LPG) engine which has a more smoothly formed fuel-injecting portion on a surface of a runner of an intake manifold than other portions to prevent a freezing phenomenon by injected fuel. According to the present invention, the intake manifold for an LPG engine using LPG as fuel has a plurality of runners (11) each branching therefrom, supplying fuel and air to each cylinder, and having an injector (20) installed thereon, and comprises a runner tip (31) installed on a portion of an inner surface of each runner (11) with which the fuel injected by the injector (20) collides, whose surface is more smoothly formed than the inner surface of the runner (11).
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