Background. Smartphone technology has spread rapidly across the globe and a growing body of literature has spotlighted how substantially these devices impact people’s everyday lives, including their family interactions. The use of the smartphone in the presence of a child (parental phubbing) has been associated with decreases in the quality of parent child interactions (e.g., less responsivity and sensitivity) and negative child outcomes (e.g., internalizing and externalizing problem behavior). In this daily diary study, we investigate intra- and interindividual associations between parental phubbing and children’s affective wellbeing in daily life. Methods. Each evening for 10 consecutive days, both parents (n=80 individuals) reported to which extent they had used their smartphone in the presence of the child that day and reflected on the child’s negative and positive affect. The data were analyzed using multilevel models. Results. Mother’s and father’s reports of the target child’s affective wellbeing were significantly correlated. Finding of multilevel models reveal that more parental phubbing was associated with more negative and less positive child affect. Discussion: These results shed light on the role of the smartphone in family environments and suggest that the child’s mood might be affected if parents engage in smartphone use during parent-child interactions. [https://www.uni-wh.de/fileadmin/user_upload/offsite/email-signatur-jubilaeum-2023-134x86px.png]<https://www.uni-wh.de/index.php?id=1611> Private Universität Witten/Herdecke gGmbH Alfred-Herrhausen-Straße 50 D - 58448 Witten Homepage: www.uni-wh.de<https://www.uni-wh.de> [https://www.uni-wh.de/fileadmin/user_upload/offsite/email-signatur-some-icons_blog.png] <https://blog.uni-wh.de> [https://www.uni-wh.de/fileadmin/user_upload/offsite/email-signatur-some-icons_instagram.png] <https://www.instagram.com/uni_wittenherdecke> [https://www.uni-wh.de/fileadmin/user_upload/offsite/e-mail-signatur-some-icons_linkedin.png] <https://de.linkedin.com/school/universit%C3%A4t-witten-herdecke/> [https://www.uni-wh.de/fileadmin/user_upload/offsite/email-signatur-some-icons_facebook.png] <https://facebook.com/UniWH> [https://www.uni-wh.de/fileadmin/user_upload/offsite/email-signatur-some-icons_youtube.png] <https://www.youtube.com/user/universitywitten> [https://www.uni-wh.de/fileadmin/user_upload/offsite/email-signatur-some-icons_twitter.png] <https://twitter.com/UniWH> Geschäftsführung: Prof. Dr. Martin Butzlaff (Präsident), Dipl. oec. Jan Peter Nonnenkamp (Kanzler) Sitz der Gesellschaft: Witten Handelsregister des Amtsgerichts Bochum Nr. HRB 8671