The difference threshold for intensity of tactile stimuli was measured using a 2IFC procedure. Two types of tactile stimuli were delivered to the right index fingers of Ss: (1) taps, approximately 10 msec in duration, and (2) 200‐msec bursts of sinusoidal vibration, 160 Hz. Difference thresholds were measured at stimulus intensities of 14, 21, 28, and 35 dB SL. Difference thresholds for taps were higher at lower intensities than the difference thresholds measured at the same intensity for the bursts of vibration. Difference thresholds were also measured for taps and bursts in the presence of extraneous vibration. The difference thresholds were elevated when signal intensities were low and the extraneous vibration was strong. The extraneous vibration raised the difference threshold for bursts more than for taps. These results may be compared to results obtained by Raab and Taub [J. Acoust. Soc. Amer.46, 965–968 (1970)] with auditory stimuli in which the presence of noise under some conditions caused a reduction in the difference threshold for clicks.