A speaker module including an inclined diaphragm and to an electronic device is provided. The speaker module includes the speaker module, the speaker module including a yoke configuring one surface of the speaker module, a magnet including one surface arranged on an inner surface of the yoke, a frame configuring a side surface of the speaker module and including a first end portion connected to the yoke, a voice coil spaced apart from the magnet and including at least a portion overlapping the magnet, and a diaphragm comprising an inner surface on which the voice coil is arranged. The diaphragm is connected to a second end portion opposite to the first end portion of the frame and is inclined to be non-perpendicular to an outer surface of the frame, so that a sound in a high-frequency band output through the speaker module can be smoothly transmitted outside the electronic device.