Whisking, the process through which rodents move their whiskers to explore the physical space around them, is a stereotyped behaviour occurring in strict coordination with nose and head movements. Whisking frequency can be phased-locked to respiration rate and olfactory inputs have been recently shown to modulate whisker-dependent responses of a subset of neurons in the barrel cortex. However, the impact of olfactory signals on whisker-dependent behaviours remains poorly understood. Here, we hypothesized that olfactory inputs influence the animal’s behaviour in a Go/No-Go texture discrimination task in head-fixed mice. We first found that animals displayed prolonged reaction times and no change in the proportion of correct choices when whiskers were trimmed. We then observed that mice showed unchanged behavioural responses in total darkness, indicating that animals did not rely on visual inputs to solve the task. In contrast, when we performed manipulations interfering with the processing of olfactory inputs, the fraction of correct choices significantly decreased both in the presence and in the absence of whiskers. Furthermore, in preliminary results using two-photon calcium imaging of the primary somatosensory cortex (S1) in combination with information theoretic analysis, we observed encoding of task-related information in S1 both in the presence of whiskers and after whisker trimming. Finally, manipulations perturbing olfaction cancelled the encoding of task-related information in S1. Altogether, these findings indicate that olfactory inputs strongly influence the ability of head-fixed mice to behaviourally discriminate textures and suggest that integration of multisensory (i.e., olfactory and somatosensory) information may occur in S1 neurons.