To provide a fuel injection control device for single cylinder engine displaying excellent startability not inferior to a multi-cylinder engine and reducing cost.

A pulse generator 2 generates a plurality of crank angle pulses at equal intervals and crank angle pulses at unequal intervals while a crankshaft of an engine makes one rotation. An ECU 3 performs a first injection by the pulse number generated within one rotation of the crankshaft or below according to the pulses and sets an injection control temporary stage and an injection control real stage. According to the injection control temporary stage and the injection control real stage, commands of second time and succeeding injections and ignitions are performed for each of an injector 4 and an ignition plug 5.