Linear compressor

A linear compressor provided with an anti-collision device to prevent a piston from coming into collision with a cylinder head and/or a suction valve even when the piston moves past an upper dead center position thereof. The anti-collision device prevents the piston of the compressor from being brought into collision with the cylinder head and/or the suction valve even when the piston moves past the upper dead center position during an operation of the compressor. Therefore, it is possible to prevent the piston and the cylinder head having the suction valve, from breaking. The linear compressor having the anti-collision device almost completely prevents a collision of the piston with the suction valve or the cylinder head during an operation, thus minimizing a gap between the piston and the cylinder head when the piston reaches the upper dead center position thereof.