Provided are an electromagnetic shield structure capable of reducing the contamination of electromagnetic noise which is radiated from a digital device into a wireless device, and a wireless apparatus using the electromagnetic shield structure. This structure has a shield function to reduce the influence of the noise radiated from an LSI (102), by a first shield (3) and a second shield (4). An open face (4g) of a first L-shaped structure portion (4a) and an open face (4h) of a second L-shaped structure portion (4b) are opposed to each other. Accordingly, even if the first L-shaped structure portion (4a) and the second L-shaped structure portion (4b) are excited by the LSI (102), the electromagnetic fields radiated from the open faces (4g and 4h) cancel each other out to reduce the radiation of noise from the first L-shaped structure portion (4a) and the second L-shaped structure portion (4b).