In the context of climatic emergency, teaching for sustainability is crucial to transform damaging behavioral social paths into sustainable ones. In this contribution, we focus on the relevance of the Degree in Primary Education to reach this change, assessing through the Sustainability Consciousness Questionnaire (SCQ) the sustainability awareness of a sample of 151 students of this bachelor’s degree. SPSS and JASP statistical programs were used for data analyses and graphical representations. The results support that this test is appropriate to estimate the different dimensions of sustainability consciousness of Spanish pre-service primary teachers. Specifically, we found that these students assign higher scores to items of sustainability knowingness and sustainability attitudes above all in the social dimension. Some gender differences are found in sustainability behavior, which is higher in the male subset for the economic dimension. Correlation analysis reveals positive associations between sustainability knowingness and sustainability attitudes, whereas sustainability behavior is positively related to both constructs but only in the social dimension. These results highlight the necessity of teaching sustainability looking for behavioral changes in the Degree of Primary Education.