A linear compressor is provided that includes a shell; a fixed member installed inside the shell, and including a cylinder that provides a compression space for a refrigerant introduced into the shell; a moving member including a piston that compresses the refrigerant sucked into the compression space inside the cylinder, and that is linearly reciprocated with respect to the fixed member; and a suction muffler positioned on or in a suction passage of the refrigerant inside the shell. A suction volume with a larger sectional area in a central portion than in both ends is defined in the suction muffler.