A control apparatus for an internal combustion engine, comprising: a fuel injection valve that injects a fuel into intake air of the internal combustion engine; a supercharger that has a turbine provided in an exhaust passage and a compressor provided in an intake passage of the internal combustion engine, and that supercharges intake air utilizing an exhaust pressure; a waste gate valve that adjusts an amount of exhaust gas that flows by bypassing the turbine of the supercharger; and fuel adherence amount calculation means that calculates a wall-surface fuel adherence amount that is an amount of fuel adhering to a wall surface of the internal combustion engine among the fuel injected from the fuel injection valve; the control apparatus for an internal combustion engine being characterized by further comprising: a data map representing a relationship between a WGV correction coefficient (Kv) for correcting a base wall-surface fuel adherence amount (FMWB) based on the degree of opening of the waste gate valve and a degree of opening of the waste gate valve, wherein the base wall-surface fuel adherence amount (FMWB) is set as a reference value for a state in which warming-up of the engine is completed and is calculated by referring to a two-dimensional data map based on a number of engine revolutions and a load factor; wherein the fuel adherence amount calculation means acquires the degree of opening of the waste gate valve and calculates the WGV correction coefficient (Kv) for correcting the base wall-surface fuel adherence amount (FMWB) by referring to the data map based on the degree of opening of the waste gate valve, and calculates the wall-surface fuel adherence amount, which has a characteristic such that the wall-surface fuel adherence amount increases as the degree of opening of the waste gate valve increases, based on at least the base wall-surface fuel adherence amount (FMWB) and the WGV correction coefficient (Kv); and fuel adherence amount reflecting means that causes the wall-surface fuel adherence amount to be reflected in a fuel injection amount that is set based on an operating state of the internal combustion engine. a fuel injection valve that injects a fuel into intake air of the internal combustion engine; a supercharger that has a turbine provided in an exhaust passage and a compressor provided in an intake passage of the internal combustion engine, and that supercharges intake air utilizing an exhaust pressure; a waste gate valve that adjusts an amount of exhaust gas that flows by bypassing the turbine of the supercharger; and fuel adherence amount calculation means that calculates a wall-surface fuel adherence amount that is an amount of fuel adhering to a wall surface of the internal combustion engine among the fuel injected from the fuel injection valve; the control apparatus for an internal combustion engine being characterized by further comprising: a data map representing a relationship between a WGV correction coefficient (Kv) for correcting a base wall-surface fuel adherence amount (FMWB) based on the degree of opening of the waste gate valve and a degree of opening of the waste gate valve, wherein the base wall-surface fuel adherence amount (FMWB) is set as a reference value for a state in which warming-up of the engine is completed and is calculated by referring to a two-dimensional data map based on a number of engine revolutions and a load factor; wherein the fuel adherence amount calculation means acquires the degree of opening of the waste gate valve and calculates the WGV correction coefficient (Kv) for correcting the base wall-surface fuel adherence amount (FMWB) by referring to the data map based on the degree of opening of the waste gate valve, and calculates the wall-surface fuel adherence amount, which has a characteristic such that the wall-surface fuel adherence amount increases as the degree of opening of the waste gate valve increases, based on at least the base wall-surface fuel adherence amount (FMWB) and the WGV correction coefficient (Kv); and fuel adherence amount reflecting means that causes the wall-surface fuel adherence amount to be reflected in a fuel injection amount that is set based on an operating state of the internal combustion engine. a data map representing a relationship between a WGV correction coefficient (Kv) for correcting a base wall-surface fuel adherence amount (FMWB) based on the degree of opening of the waste gate valve and a degree of opening of the waste gate valve, wherein the base wall-surface fuel adherence amount (FMWB) is set as a reference value for a state in which warming-up of the engine is completed and is calculated by referring to a two-dimensional data map based on a number of engine revolutions and a load factor; wherein the fuel adherence amount calculation means acquires the degree of opening of the waste gate valve and calculates the WGV correction coefficient (Kv) for correcting the base wall-surface fuel adherence amount (FMWB) by referring to the data map based on the degree of opening of the waste gate valve, and calculates the wall-surface fuel adherence amount, which has a characteristic such that the wall-surface fuel adherence amount increases as the degree of opening of the waste gate valve increases, based on at least the base wall-surface fuel adherence amount (FMWB) and the WGV correction coefficient (Kv); and fuel adherence amount reflecting means that causes the wall-surface fuel adherence amount to be reflected in a fuel injection amount that is set based on an operating state of the internal combustion engine.