A fuel supply apparatus for an internal combustion engine including two fuel injection valves (24R and 24L) for a same cylinder, the apparatus comprising: a drive circuit that is commonly provided with respect to the two fuel injection valves (24R and 24L) for a same cylinder, and drives the two fuel injection valves (24R and 24L) for a same cylinder on a basis of a command from outside; an electric conduction line that electric current supplied to the two fuel injection valves (24R and 24L) flows through, the electric conduction line including a common section one end of which is connected to the drive circuit, the electric conduction line including branch sections which are sections following another end of the common section that the electric conduction line branches off at and on which the two fuel injection valves (24R and 24L) for a same cylinder are respectively installed; electric current detection means for detecting electric current which flows through the common section of the electric conduction line; an electric resistance which is inserted in the branch section of the electric conduction line with respect to each of one or more installation target fuel injection valves, each value of the electric resistances being different from each other if the installation target fuel injection valves are more than one, wherein the installation target fuel injection valves correspond to all or all-minus-one of the two fuel injection valves (24R and 24L) for a same cylinder; and abnormal fuel injection valve detection means for detecting a fuel injection valve (24R or 24L), at which an occurrence of abnormality concerning electric conduction is recognized, out of the two fuel injection valves (24R and 24L) for a same cylinder, on a basis of a magnitude of an electric current value detected by the electric current detection means, wherein, where an electric current value detected by the electric current detection means is a first determination value or less, the abnormal fuel injection valve detection means detects a fuel injection valve at which an occurrence of abnormality concerning electric conduction is recognized, based on whether or not the electric current is smaller than a second determination value, wherein the first determination value is a value being able to judge whether the electric conduction to the two fuel injection valves (24R or 24L) for a same cylinder is normal or abnormality has occurred at either one of the two fuel injection valves (24R or 24L), and wherein the second determination value is a value existing between an electric current value when abnormality has occurred at one of the two fuel injection valves (24R or 24L) for a same cylinder and an electric current value when abnormality has occurred at a rest of the two fuel injection valves (24R or 24L). a drive circuit that is commonly provided with respect to the two fuel injection valves (24R and 24L) for a same cylinder, and drives the two fuel injection valves (24R and 24L) for a same cylinder on a basis of a command from outside; an electric conduction line that electric current supplied to the two fuel injection valves (24R and 24L) flows through, the electric conduction line including a common section one end of which is connected to the drive circuit, the electric conduction line including branch sections which are sections following another end of the common section that the electric conduction line branches off at and on which the two fuel injection valves (24R and 24L) for a same cylinder are respectively installed; electric current detection means for detecting electric current which flows through the common section of the electric conduction line; an electric resistance which is inserted in the branch section of the electric conduction line with respect to each of one or more installation target fuel injection valves, each value of the electric resistances being different from each other if the installation target fuel injection valves are more than one, wherein the installation target fuel injection valves correspond to all or all-minus-one of the two fuel injection valves (24R and 24L) for a same cylinder; and abnormal fuel injection valve detection means for detecting a fuel injection valve (24R or 24L), at which an occurrence of abnormality concerning electric conduction is recognized, out of the two fuel injection valves (24R and 24L) for a same cylinder, on a basis of a magnitude of an electric current value detected by the electric current detection means, wherein, where an electric current value detected by the electric current detection means is a first determination value or less, the abnormal fuel injection valve detection means detects a fuel injection valve at which an occurrence of abnormality concerning electric conduction is recognized, based on whether or not the electric current is smaller than a second determination value, wherein the first determination value is a value being able to judge whether the electric conduction to the two fuel injection valves (24R or 24L) for a same cylinder is normal or abnormality has occurred at either one of the two fuel injection valves (24R or 24L), and wherein the second determination value is a value existing between an electric current value when abnormality has occurred at one of the two fuel injection valves (24R or 24L) for a same cylinder and an electric current value when abnormality has occurred at a rest of the two fuel injection valves (24R or 24L).