A stretchable film (2) contains an inorganic filler and a thermoplastic elastomer and has an elastomer layer (10) and a first surface layer (20) and a second surface layer (22) disposed on both of a first side (10a) and a second side (10b) of the elastomer layer (10). In an hysteresis curve provided by measuring the stress during a 0-100 percent elongation, and assigning A, B, and C to the measurement points at elongation ratios of 30 percent, 50 percent, and 70 percent, respectively, the slope of the straight line p connecting point A with point B and the slope of the straight line q connecting point B and point C are both less than or equal to 7.0 x 10-3.
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