The objectives of this research were 1) to study the innovative thinking skills of teachers in Samut Prakan Vocational Colleges, Thailand, and 2) to study guidelines for developing innovative thinking skills of teachers in Samut Prakan Vocational Colleges, Thailand. The sample consisted of 5 experts for interviews, and 201 teachers for questionnaires. The research instruments were questionnaires with an IOC (Index of Item-Objective Congruence) value between .67 and 1.00, and a reliability value of .96 and an interview form. Data were analyzed by using mean, standard deviation, and content analysis. The results of the research were as follows : 1) the innovative thinking skills of teachers were at a high level, in overall and particular aspects, ranking from the highest to the lowest mean : Crafting, Imaging, Personalizing, Collaborative, Serious play, and Paying attention, and 3) Development Guidelines of 1) Crafting: Workshops and Training, Collaborative Projects, Case Studies, Industry Collaboration, and Innovation Labs; 2) Imaging: Incorporate Visual Storytelling ,Utilize Digital and Immersive Tools, Real-World Applications and Simulations, Visual Mapping for Critical Thinking, and Collaborative Visual Brainstorming; 3) Personalizing: Teacher Training and Reflection, Student-Centered Learning, Industry Collaboration and Practical Application, Collaborative Platforms for Peer Learning, and Tailored Learning Plans; 4) Collaborative inquiry: Structured Collaborative Environments, Collaborative Research Projects, Technology Integration, Leadership in Collaboration, and Institutional Networks; 5) Serious play: Innovation Labs/Makerspaces, Prototyping and Iteration, Workshops and Collaborative Projects, Challenge-Based Learning, and Innovation Challenges; and 6) Paying attention: Implement Hands-On Workshops, Integrate Technology, Adopt Project-Based Learning, Foster Collaborative Learning, and Encourage Cross-Disciplinary Learning.